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Samsung Galaxy S21 Ultra (SM-G998B/DS 128GB) vs Asus ROG Phone (128GB)

Side by side comparison between Samsung Galaxy S21 Ultra vs Asus ROG Phone phones, differences, pros, cons and full specifications. What's the better?

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Compare Asus ROG Phone X Samsung Galaxy S21 Ultra (SM-G998B/DS 128GB) 26Points
6.8"
AMOLED

1440x3200

108
MP

40mp

12GB
RAM

Octa-core

5000
mAh

(Non removable)

vs
6"
AMOLED

1080x2160

12
MP

8mp

8GB
RAM

Octa-core

4000
mAh

(Non removable)

What's the better phone? Samsung Galaxy S21 Ultra (SM-G998B/DS 128GB)

The phonemore's choice is much more technical than personal. Therefore, you shouldn't only consider this. Our goal is to help you, but what's important to us may not be important to you. You decide which one is the best! Comment!

Galaxy S21 Ultra (SM-G998B/DS 128GB)} 26 Advantages Samsung Galaxy S21 Ultra (SM-G998B/DS 128GB) vs ROG Phone (128GB)} 5 Advantages Asus ROG Phone (128GB)
+12GB LPDDR550%
More RAM memory. Typically more responsive and better for multitasking.
vs8GB LPDDR4X
+UFS 3.1Advantage
Fastest write and read storage.
vsUFS 2.1
+Dynamic AMOLEDAdvantage
Dynamic AMOLED display is brighter and more vivid
vsAMOLED
+HDR10+Advantage
The HDR10+ display provides vibrant colors and more details
vsHDR8
+120Hz33%
The display reproduces more frames per second because the frequency (Hertz) is higher, improves fluidity and tires your eyes less.
vs90Hz
+1440x3200 pixels98%
Higher resolution screen
vs1080x2160 pixels
+516 PPI28%
Crisper display of text, images and videos because it has more pixels per inch (ppi)
vs402 PPI
+6.8"13%
Larger screen
vs6"
+(quad camera) 108MP + 10MP + 10MP + 12MP6 times
Higher resolution main camera
vs(dual camera) 12MP + 8MP
+Digital and optical zoomAdvantage
The zoom allows for better focus and approach to take pictures
vsOnly digital zoom
+1/1.33" inches92%
The larger sensor camera lets you take photos with better depth.
vs1/2.55" inches
+(front) 40MP4 times
Higher resolution secondary camera to take pictures and selfies
vs(front) 8MP
+8K UHD (7680x4320)3 times
More image quality for recording videos with the primary camera
vs4K UHD (3840x2160)
+(front) 4K UHD (3840x2160)3 times
More image quality for recording videos with the secondary camera
vs(front) Full HD (1920x1080)
+Android 14Advantage
Android 14 is newer and safer
vsAndroid 9.0 Pie
+5G SA/NSAAdvantage
The 5G SA/NSA network is newer and faster
vs4G LTE-A
+(5G SA/NSA) 5000 Mbps4 times
Faster for surfing the internet and download files
vs(4G LTE-A) 1024 Mbps
+BarometerAdvantage
Sensors help you use the device
vsNot supported
+UWB (Ultra Wideband)Advantage
Sensors help you use the device
vsNot supported
+5000 mAh25%
Battery - higher amperage (mAh) allows more device usage time, but it also depends on the hardware and use
vs4000 mAh
+Qi wireless charging (Qi/PMA)Advantage
Wireless charging is another way to charge the battery.
vsNot supported
+2 slots (Dual-SIM) + e-SIM (Eletronic)Advantage
You can have more mobile carriers/operators on the same device.
vs2 slots (Dual-SIM)
+DLNAAdvantage
With DLNA technology you can access and play media files on TV, tablet or DLNA compatible device.
vsNot supported
+5.2 + A2DP/LEAdvantage
Bluetooth 5.2 + A2DP/LE is newer and faster
vs5.0 + A2DP/LE
+USB 3.2 Type-C, USB OTG On-The-GoAdvantage
Newer and faster USB version for transferring photos, mp3 or data.
vsUSB 3.1 Type-C reversible connector
+IP68 certifiedAdvantage
Protection against water allows you talk to your friends in the rain, for example
vsWater splash resistant (don't immerse)
2.9GHz 64bit Octa-core (5nm)vs+2.96GHz 64bit Octa-core3%
More powerful processor, you can open your applications faster
227 grams (7.95 ounces)vs+200 grams (7 ounces)14%
Lighter
8.9 millimeters (0.35 inches)vs+8.65 millimeters (0.34 inches)3%
Thinner
25Wvs+30W20%
More power (watts) to charge the battery faster. Sometimes, the charger that comes with the device doesn't have the same power supported by the device. Check before you buy it.
Type-C reversible connectorvs+3.5mm jackAdvantage
Headsets with 3.5mm Jack size are more common and easy to find in stores

24 Common items in both devices
128GB (101GB available) / 128GB (109GB available)
Aluminum frame, glass front/back
16 million
LED flash
PDAF: phase detection autofocus on both cameras / PDAF: phase detection autofocus
OIS: Optical stabilization / OIS (4-axis): Optical stabilization
HDR photo/video on both cameras / HDR photo on both cameras
+17 specs and more in the table below

Check the comparison table below for more items that are not evaluated in comparison score above.

Highlight differences Clear highlight

📱 Model features

Galaxy S21 Ultra (SM-G998B/DS 128GB)Asus ROG Phone (128GB)
ModelGalaxy S21 Ultra (SM-G998B/DS 128GB)ROG Phone (128GB)
Other model namesGalaxy S21 Ultra 5G (SM-G998B/Dual-SIM)Asus ROG Phone ZS600KL, Z01QD
Country or region available(Global, International)
(Global, International)
(Global, International)
(Global, International)
BrandSamsungAsus
Release date1/29/2021, Announced: 1/14/20219/1/2018
Depth8.9 millimeters (0.35 inches)8.65 millimeters (0.34 inches)
Size (width x height)75.6 x 165.1 millimeters (2.98 x 6.5 in)76.16 x 158.83 millimeters (3 x 6.25 in)
Weight227 grams (7.95 ounces)200 grams (7 ounces)
Build, materialsAluminum frame, glass front/backAluminum frame, glass front/back
Protection against water and othersIP68 certified: water-resistant up to 1.5 meters for 30min and dust-resistantWater splash resistant (don't immerse)

📲 Display

Galaxy S21 Ultra (SM-G998B/DS 128GB)Asus ROG Phone (128GB)
Display typeDynamic AMOLEDAMOLED
Screen size6.8" inches6" inches
Screen-to-body ratio~89.4% (screen-to-body ratio)~76.8% (screen-to-body ratio)
Display resolution1440x3200 pixels (20:9)1080x2160 pixels (18:9)
TouchscreenCapacitive Multitouch 10-pointsCapacitive Multitouch 10-points
Pixel density (dot pitch)516 PPI402 PPI
Colors16 million16 million
Scratch-resistant glassGorilla Glass VictusGorilla Glass 3
Refresh rate120Hz90Hz
Display features1500nits[peak]
HDR10+
Always-On Display
550nits[typ]
HDR8

🤖 Operating System

Galaxy S21 Ultra (SM-G998B/DS 128GB)Asus ROG Phone (128GB)
System versionAndroid 11Android 8.1 Oreo
Firmware updateAndroid 14Android 9.0 Pie
User InterfaceOne UI 3.1 / 4.1 / 5.1 / 6.0feature not registered

⚙️ Processor

Galaxy S21 Ultra (SM-G998B/DS 128GB)Asus ROG Phone (128GB)
Chipset64bit: Samsung Exynos 2100 (5nm)64bit: Qualcomm Snapdragon 845 MSM8998 (10nm)
CPUOcta-core, 3 processors:
1x 2.9GHz ARM Cortex-X1 (Single-core)
3x 2.8GHz ARM Cortex-A78 (Triple-core)
4x 2.2GHz ARM Cortex-A55 (Quad-core)
Octa-core, 2 processors:
4x 2.96GHz Kryo 385 Gold (Quad-core)
4x 1.7GHz Kryo 385 Silver (Quad-core)
GPU graphical controllerARM Mali-G78 MP14 (854MHz)Qualcomm Adreno 630 710Mhz
Performance (benchmark)AnTuTu: 657150 (v8), 727634 (v9)
Geekbench: 3457 (v5.2)
GFXBench: 51fps (ES 3.1 onscreen)
feature not registered

💽 Memory and storage

Galaxy S21 Ultra (SM-G998B/DS 128GB)Asus ROG Phone (128GB)
RAM memory12GB LPDDR58GB LPDDR4X
Internal storage128GB (101GB available)
UFS 3.1
128GB (109GB available)
UFS 2.1
External storageNot supportedNot supported

📶 Mobile networks

Galaxy S21 Ultra (SM-G998B/DS 128GB)Asus ROG Phone (128GB)
Dual-SIMDual-SIM Standby - Call active on one sim cardDual-SIM Standby - Call active on one sim card
SIM card2 slots (Dual-SIM)
nano-SIM (4FF) + e-SIM
2 slots (Dual-SIM)
nano-SIM (4FF)
Maximum Download / Upload5000/1920 Mbps1024/150 Mbps
Network technology2G, 3G, 4G, 5G2G, 3G, 4G
Frequency, bands Expand band details Collapse details
GSM MHz bandQuad-Band 850/900/1800/1900Quad-Band 850/900/1800/1900
Primary 2G networkGSM 850/900/1800/1900CDMA 800, GSM 850/900/1800/1900
Primary 3G networkUMTS 850/900/1700/1900/2100CDMA2000 1xEV-DO (B version)
TD-SCDMA 1900/2000 (B version)
UMTS 800/850/900/1700/1800/1900/2100
Primary 4G networkLTE Cat20 (1, 2, 3, 4, 5, 7, 8, 12, 13, 17, 18, 19, 20, 25, 26, 28, 32, 66)
TD-LTE (38, 39, 40, 41)
VoLTE
LTE Cat16 (1, 2, 3, 4, 5, 7, 8, 12, 13, 17, 18, 19, 20, 28, 29, 32)
TD-LTE (34, 38, 39, 40, 41, 46)
Primary 5G networkSA/NSA/Sub6 (1, 3, 5, 7, 8, 20, 28, 38, 40, 41, 66, 77, 78)Not supported
Primary data networkGPRS, EDGE, UMTS, HSDPA, HSUPA, HSPA+, TD-LTE, LTE, LTE-A, SA/NSAGPRS, EDGE, CDMA2000 EV-DO Rev 0, CDMA2000 EV-DO Rev A, TD-SCDMA, UMTS, TD-HSDPA, HSDPA, HSUPA, HSPA+, TD-LTE, LTE, LTE-A
Secondary 2G networkGSM 850/900/1800/1900GSM 850/900/1800/1900
Secondary 3G networkUMTS 850/900/1700/1900/2100Not supported
Secondary 4G networkLTE Cat20 (1, 2, 3, 4, 5, 7, 8, 12, 13, 17, 18, 19, 20, 25, 26, 28, 32, 66)
TD-LTE (38, 39, 40, 41)
VoLTE
Not supported
Secondary data networkGPRS, EDGE, UMTS, HSDPA, HSUPA, HSPA+, TD-LTE, LTE, LTE-A, SA/NSAGPRS, EDGE

📷 Camera

Galaxy S21 Ultra (SM-G998B/DS 128GB)Asus ROG Phone (128GB)
Back camera (main camera)(quad camera)
108 megapixels
10MP periscope telephoto f/4.9240mm1/3.24"1.22µmPDAFOIS10x-optical-zoom
10MP telephoto f/2.470mm1/3.24"1.22µmPDAFOIS3x-optical-zoom
12MP ultrawide f/2.213mm1/2.55"1.4µmPDAFSuper-Steady-video
(dual camera)
12 megapixels
8MP ultrawide 12mmFF
Main camera resolution12000x9000 pixels4000x3000 pixels
Video recording (primary)8K UHD (7680x4320) 24 fps4K UHD (3840x2160) 60 fps
FlashLED flashLED flash
Focal aperturef/1.8 (aperture)f/1.8 (aperture)
Focal length26mm lens24mm lens
Sensor size1/1.33" inches1/2.55" inches
Pixel size1.8µm pixel1.4µm pixel
AutofocusPDAF: phase detection autofocus on both camerasPDAF: phase detection autofocus
Touch focusSupportedSupported
Image stabilizationOIS: Optical stabilizationOIS (4-axis): Optical stabilization
ZoomDigital and optical zoomOnly digital zoom
Face/smile detectionFace detection, Smile detectionFace detection, Smile detection
BSI sensorSupportedNot supported
HDRHDR photo/video on both camerasHDR photo on both cameras
Camera extras4K@60fps
1080p@240fps
720p@960fps
feature not registered

📸 Front camera

Galaxy S21 Ultra (SM-G998B/DS 128GB)Asus ROG Phone (128GB)
Front camera (secondary)40 megapixels8 megapixels
Front camera resolution7296x5472 pixels3264x2448 pixels
Video recording (secondary)4K UHD (3840x2160)Full HD (1920x1080)
Front flashNot supportedNot supported
Focal aperturef/2.2 (aperture)f/2.0 (aperture)
Focal length26mm lens24mm lens
Sensor size1/2.8" inchesfeature not registered
Pixel size0.7µm pixelfeature not registered

🔉 Sound and multimedia

Galaxy S21 Ultra (SM-G998B/DS 128GB)Asus ROG Phone (128GB)
LoudspeakerStereo sound
32-bit/384kHz
Dolby Atmos
Tuned by AKG
Supported
Active noise cancellation2 microphones or more2 microphones or more
RadioFMFM
TVNot supportedNot supported
Video formatsMP4, H.265, H.264, H.263, XviD, MKVMP4, H.265, H.264, H.263, XviD
Audio formatsMP3, WAV, WMA, eAAC+, FLACMP3, OGG, eAAC+, FLAC

🔌 Connectivity

Galaxy S21 Ultra (SM-G998B/DS 128GB)Asus ROG Phone (128GB)
USBUSB 3.2 Type-C, USB OTG On-The-GoUSB 3.1 Type-C reversible connector
Audio outputType-C reversible connector3.5mm jack
TV outputUSB Type-C (reversible)USB Type-C (reversible)
Bluetooth5.2 + A2DP/LE5.0 + A2DP/LE
WiFi802.11 a/b/g/n/ac/ax [wifi6] (2.4GHz, 5GHz) + MIMO
WiFi Direct, hotspot
802.11 a/b/g/n/ac/ad [wifi5/ad] (2.4GHz, 5GHz, 60GHz) + MIMO
WiFi Direct, hotspot
DLNASupportedNot supported
GPSA-GPS, GeoTagging, GLONASS, GALILEO, BeiDouA-GPS, GeoTagging, GLONASS, BeiDou
NFCSupportedSupported
Infrared portNot supportedNot supported

🧭 Sensors

Galaxy S21 Ultra (SM-G998B/DS 128GB)Asus ROG Phone (128GB)
SensorsAccelerometer
Ambient light sensor
Barometer
Compass
Face unlock
Fingerprint sensor (under display)
Gesture
Gyroscope
Hall effect
Proximity sensor
UWB (Ultra Wideband)
Accelerometer
Ambient light sensor
Compass
Face unlock
Fingerprint sensor (rear-mounted)
Gyroscope
Proximity sensor
Vibrating alertSupportedSupported

🔋 Battery

Galaxy S21 Ultra (SM-G998B/DS 128GB)Asus ROG Phone (128GB)
Battery typeLiPo: li-ion polymer (Non removable)Li-Ion: lithium-ion (Non removable)
Battery capacity5000 mAh4000 mAh
Charger, watts25W Wired fast charging
USB Power Delivery 3.0
30W (10V/3A) Wired fast charging
Quick Charge 4+
Inductive / wireless charging15W Qi wireless charging (Qi/PMA)
4.5W Reverse wireless charging
Not supported
Talk time autonomyfeature not registeredfeature not registered
Standbyfeature not registeredfeature not registered

➕ Other features

Galaxy S21 Ultra (SM-G998B/DS 128GB)Asus ROG Phone (128GB)
Call controlVoice dialing, Voice recorder, Voice commandsVoice dialing, Voice recorder
MessagingSMS (T9), MMS, E-mail, Push mailSMS (T9), MMS, E-mail, Push mail
Hands-free callingSupportedSupported
Video callingSupportedSupported
RingtonesPolyphonic and customizedPolyphonic and customized
Web browserHTML, XHTML, HTML5HTML, XHTML, HTML5
AntennaInternal antennaInternal antenna
Qwerty physical keyboardNot supportedNot supported
Miscellaneous• Colors: Phantom Black, Silver, Titanium, Navy, Brown
• Samsung Pay (Visa, MasterCard)
• Samsung DeX
• Stylus pen support
• Colors: Black
• Front/back Gorilla glass
• 2.5D curved glass screen
• 3D curved glass back panel
• 90Hz display (1ms response time)
• 108.6% DCI-P3 color gamut
• Supports glove touch
• Sony IMX363 back camera sensor
• Quick Charge 4+
• Hi-Res audio
• 24-bit/192kHz audio
• Vapor-chamber cooling system

☢️ Radiation rate

Galaxy S21 Ultra (SM-G998B/DS 128GB)Asus ROG Phone (128GB)
SAR 1.6W/kg (USA, Mexico, etc.)0.24W/kg (head), 0.72W/kg (body)feature not registered
SAR 2W/kg (Europe, UK, etc.)0.714W/kg (head), 1.58W/kg (body)feature not registered
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