Amazon's Kindle HDX comes in a 7-inch and 8.9-inch model. The 7-inch model is currently available on Amazon and the 8.9-inch will be released on November 7th. These tablets have about three times more processing power than the Kindle Fire HD tablets making them able to launch apps and load websites quickly.
The Wi-Fi enabled 7-inch model begins pricing at $229 for a 16GB model and goes up to $309 for a 64GB model. The same size model that also supports 4G LTE begins at about $329 and goes up to more than $400.
The larger Wi-Fi enabled model, the 8.9-inch version, begins pricing at $379 for a 16GB. The model that also supports 4G LTE costs about $480 for a 16GB model and goes up to $579 for a 64GB version.
The 7-inch tablet is more compact than Google's Nexus 7, but is a little bit heavier. Both size models of the Nexus have an HDX display, which make them good devices for watching video, reading and playing games.
The 7-inch Kindle model features a 1.2 megapixel front-facing camera, but no rear facing camera. The larger model has an 8 megapixel rear-facing camera with flash, as well as a 720 pixel HD front-facing camera.
Operating system and battery life:
The tablets runs on a modified version of Android, which is called Amazon Fire OS 3.0.
The 7-inch model has about 11 hours of battery life for mixed use and the 8.9-inch model has about 12 hours.
One of the biggest differences between a Kindle Fire and a Nexus device is the available content.
Not as many apps are available on the Kindle Fire HDX tablets as on the Nexus tablets because Amazon runs its own app store. Instagram is one of the most popular apps missing. Google's productivity apps are also missing, which includes Google Docs.