The Amazon Kindle Fire HDX 8.9 has 4 models and variants. Generally the variants are the same device models with some different features and specifications, as the amount of internal storage, processor or just 3G/4G frequencies that may be different depending on the country where the Amazon Kindle Fire HDX 8.9 is sold.
Compare the 4 Amazon Kindle Fire HDX 8.9 models and know what are the specifications that differ one from another version in the full datasheet.
See here on the PhoneMore all Amazon Kindle Fire HDX 8.9 versions.