Asus Zenfone 5Z (ZS621KL 256GB) vs Blu Studio Energy (D810U)
Side by side comparison between Asus Zenfone 5Z vs Blu Studio Energy phones, differences, pros, cons and full specifications. What's the better?
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6.2"
IPS
IPS
1080x2246
12
MP
MP
8mp
8GB
RAM
RAM
Octa-core
3300
mAh
mAh
(Non removable)
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What's the better phone? Asus Zenfone 5Z (ZS621KL 256GB)
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!
25 Advantages 
3 Advantages | 16 Common items in both devices |
| TFT IPS LCD |
| 16 million |
| Only digital zoom |
| PDAF: phase detection autofocus / Autofocus |
| Capacitive |
| Multitouch |
| Accelerometer |
| +9 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 | ||
| Asus Zenfone 5Z (ZS621KL 256GB) | Blu Studio Energy (D810U) | |
| Model | Zenfone 5Z (ZS621KL 256GB) | Studio Energy (D810U) |
| Other model names | Asus Zenfone 5z 8GB RAM (ZS621KL), ASUS_Z01RD | BLU Studio Energy Dual Sim, BLU D810U |
| Country or region available |  India |  USA |
| Brand | Asus | Blu |
| Release date | 6/1/2018 | 1/1/2015 |
| Depth | 7.9 millimeters (0.31 inches) | 10.4 millimeters (0.41 inches) |
| Size (width x height) | 75.65 x 153 millimeters (2.98 x 6.02 in) | 71.5 x 144.5 millimeters (2.81 x 5.69 in) |
| Weight | 165 grams (5.78 ounces) | 180 grams (6.3 ounces) |
| Build, materials | Aluminum frame, glass front/back | feature not registered |
| Protection against water and others | Not supported | Not supported |
📲 Display | ||
| Asus Zenfone 5Z (ZS621KL 256GB) | Blu Studio Energy (D810U) | |
| Display type | TFT IPS LCD | TFT IPS LCD |
| Screen size | 6.2" inches | 5" inches |
| Screen-to-body ratio | ~83.7% (screen-to-body ratio) | ~66.7% (screen-to-body ratio) |
| Display resolution | 1080x2246 pixels (18.7:9) | 720x1280 pixels |
| Touchscreen | Capacitive Multitouch 10-points | Capacitive Multitouch |
| Pixel density (dot pitch) | 402 PPI | 294 PPI |
| Colors | 16 million | 16 million |
| Scratch-resistant glass | Gorilla Glass | Gorilla Glass 3 |
| Refresh rate | 60Hz | feature not registered |
| Display features | 550nits[typ] | feature not registered |
🤖 Operating System | ||
| Asus Zenfone 5Z (ZS621KL 256GB) | Blu Studio Energy (D810U) | |
| System version | Android 8.0 Oreo | Android 4.4.2 KitKat |
| Firmware update | Android 10 | Android 5.0.2 Lollipop |
| User Interface | feature not registered | feature not registered |
⚙️ Processor | ||
| Asus Zenfone 5Z (ZS621KL 256GB) | Blu Studio Energy (D810U) | |
| Chipset | 64bit: Qualcomm Snapdragon 845 MSM8998 (10nm) | 32bit: MediaTek MT6582 |
| CPU | Octa-core, 2 processors: 4x 2.7GHz Kryo 385 Gold (Quad-core) 4x 1.7GHz Kryo 385 Silver (Quad-core) | Quad-core, 1 processor: 4x 1.3GHz ARM Cortex-A7 (Quad-core) |
| GPU graphical controller | Qualcomm Adreno 630 710Mhz | ARM Mali-400 MP2 |
| Performance (benchmark) | feature not registered | feature not registered |
💽 Memory and storage | ||
| Asus Zenfone 5Z (ZS621KL 256GB) | Blu Studio Energy (D810U) | |
| RAM memory | 8GB LPDDR4X | 1GB LPDDR2 |
| Internal storage | 256GB (240GB available) UFS 2.1 | 8GB (4GB available) |
| External storage | Until 1TB microSD, microSDXC (hybrid slot/shares the same SIM-2 slot) | Until 64GB microSD, microSDXC (dedicated slot) |
📶 Mobile networks | ||
| Asus Zenfone 5Z (ZS621KL 256GB) | Blu Studio Energy (D810U) | |
| Dual-SIM | Dual-SIM Standby - Call active on one sim card (hybrid slot/shares the same microSD slot) | Dual-SIM Standby - Call active on one sim card (dedicated slot) |
| SIM card | 2 slots (Dual-SIM) nano-SIM (4FF) | 2 slots (Dual-SIM) micro-SIM (3FF) |
| Maximum Download / Upload | 800/100 Mbps | 21/5.76 Mbps |
| Network technology | 2G, 3G, 4G | 2G, 3G |
| Frequency, bands | Expand band details Collapse details | |
| GSM MHz band | Quad-Band 850/900/1800/1900 | Quad-Band 850/900/1800/1900 |
| Primary 2G network | GSM 850/900/1800/1900 | GSM 850/900/1800/1900 |
| Primary 3G network | UMTS 800/850/900 | UMTS 850/1700/1900 |
| Primary 4G network | LTE Cat15 (Bands 1,2,3,5,7,8,18,19,20,26,28) TD-LTE (Bands 38,39,40,41) | Not supported |
| Primary 5G network | Not supported | Not supported |
| Primary data network | GPRS, EDGE, UMTS, HSDPA, HSUPA, HSPA+, TD-LTE, LTE, LTE-A | GPRS, EDGE, UMTS, HSDPA, HSUPA, HSPA+ |
| Secondary 2G network | GSM 850/900/1800/1900 | GSM 850/900/1800/1900 |
| Secondary 3G network | Not supported | Not supported |
| Secondary 4G network | Not supported | Not supported |
| Secondary data network | GPRS, EDGE | GPRS, EDGE |
📷 Camera | ||
| Asus Zenfone 5Z (ZS621KL 256GB) | Blu Studio Energy (D810U) | |
| Back camera (main camera) | (dual camera) 12 megapixels 8MP ultrawide f/2.012mm1/4"1.12µmFF | 8 megapixels |
| Main camera resolution | 4000x3000 pixels | 3264x2448 pixels |
| Video recording (primary) | 4K UHD (3840x2160) 30 fps | Full HD (1920x1080) 30 fps |
| Flash | Dual-LED flash | LED flash |
| Focal aperture | f/1.8 (aperture) | feature not registered |
| Focal length | 24mm lens | feature not registered |
| Sensor size | 1/2.55" inches | feature not registered |
| Pixel size | 1.4µm pixel | feature not registered |
| Autofocus | PDAF: phase detection autofocus | Autofocus |
| Touch focus | Supported | Supported |
| Image stabilization | OIS (4-axis): Optical stabilization | feature not registered |
| Zoom | Only digital zoom | Only digital zoom |
| Face/smile detection | Face detection, Smile detection | Face detection, Smile detection |
| BSI sensor | Not supported | Not supported |
| HDR | HDR photo on both cameras | HDR photo only main camera |
| Camera extras | feature not registered | feature not registered |
📸 Front camera | ||
| Asus Zenfone 5Z (ZS621KL 256GB) | Blu Studio Energy (D810U) | |
| Front camera (secondary) | 8 megapixels | 2 megapixels |
| Front camera resolution | 3264x2448 pixels | 1600x1200 pixels |
| Video recording (secondary) | Full HD (1920x1080) | HD (1280x720) |
| Front flash | Not supported | Not supported |
| Focal aperture | f/2.0 (aperture) | feature not registered |
| Focal length | 24mm lens | feature not registered |
| Sensor size | 1/4" inches | feature not registered |
| Pixel size | 1.12µm pixel | feature not registered |
🔉 Sound and multimedia | ||
| Asus Zenfone 5Z (ZS621KL 256GB) | Blu Studio Energy (D810U) | |
| Loudspeaker | Supported | Supported |
| Active noise cancellation | 2 microphones or more | Not supported |
| Radio | FM | FM (RDS) |
| TV | Not supported | Not supported |
| Video formats | MP4, H.265, H.264, H.263 | MP4, H.264, H.263, DivX, XviD, WMV |
| Audio formats | MP3, OGG, eAAC+, FLAC | MP3, WAV, WMA, AAC+ |
🔌 Connectivity | ||
| Asus Zenfone 5Z (ZS621KL 256GB) | Blu Studio Energy (D810U) | |
| USB | USB 2.0 Type-C, USB OTG On-The-Go | MicroUSB 2.0 |
| Audio output | 3.5mm jack | 3.5mm jack |
| TV output | Not supported | Not supported |
| Bluetooth | 5.0 + A2DP/LE | 4.0 + A2DP |
| WiFi | 802.11 a/b/g/n/ac [wifi5] (2.4GHz, 5GHz) WiFi Direct, hotspot | 802.11 b/g/n [wifi4] (2.4GHz) WiFi Direct, hotspot |
| DLNA | Not supported | Not supported |
| GPS | A-GPS, GeoTagging, GLONASS, BeiDou | A-GPS, GeoTagging |
| NFC | Supported | Not supported |
| Infrared port | Not supported | Not supported |
🧭 Sensors | ||
| Asus Zenfone 5Z (ZS621KL 256GB) | Blu Studio Energy (D810U) | |
| Sensors | Accelerometer Ambient light sensor Compass Face unlock Fingerprint sensor (rear-mounted) Gyroscope Proximity sensor | Accelerometer Ambient light sensor Gyroscope Proximity sensor |
| Vibrating alert | Supported | Supported |
🔋 Battery | ||
| Asus Zenfone 5Z (ZS621KL 256GB) | Blu Studio Energy (D810U) | |
| Battery type | Li-Ion: lithium-ion (Non removable) | Li-Ion: lithium-ion (Removable) |
| Battery capacity | 3300 mAh | 5000 mAh |
| Charger, watts | 18W (9V/2A) Wired fast charging | Wired charging |
| Inductive / wireless charging | Not supported | feature not registered |
| Talk time autonomy | 25 hours (1 days) | 33 hours (1.4 days) |
| Standby | feature not registered | 1080 hours (45 days) |
➕ Other features | ||
| Asus Zenfone 5Z (ZS621KL 256GB) | Blu Studio Energy (D810U) | |
| Call control | Voice dialing, Voice recorder | Voice dialing, Voice recorder |
| Messaging | SMS (T9), MMS, E-mail, Push mail | SMS (T9), MMS, E-mail, Push mail |
| Hands-free calling | Supported | Supported |
| Video calling | Supported | Supported |
| Ringtones | Polyphonic and customized | Polyphonic and customized |
| Web browser | HTML, XHTML, HTML5 | HTML, XHTML, HTML5 |
| Antenna | Internal antenna | Internal antenna |
| Qwerty physical keyboard | Not supported | Not supported |
| Miscellaneous | • Colors: Midnight Blue, Meteor Silver • 2.5D curved glass screen • 95% DCI-P3 coverage • Supports glove touch • ASUS ZenUI 5.0 • 24-bit/192kHz audio • DTS sound (only headphones) | • Colors: Black, White, Gold • Screen protector included • BLU Infinite View technology |
☢️ Radiation rate | ||
| Asus Zenfone 5Z (ZS621KL 256GB) | Blu Studio Energy (D810U) | |
| SAR 1.6W/kg (USA, Mexico, etc.) | 1.04W/kg (head), 0.37W/kg (body) | feature not registered |
| SAR 2W/kg (Europe, UK, etc.) | 1.2W/kg (head), 1.477W/kg (body) | feature not registered |