Here's our breakdown of how the Amazon Kindle Fire 7" HDX stacks up against the Amazon Kindle Fire 7" HD.

 Pros and Cons of the Amazon Kindle Fire 7" HDX:

The Amazon Kindle Fire 7" HDX has a more powerful CPU and a better customized OS on top of Android Jelly Bean. The display is more vivid thanks to higher pixel density. The 2.2-GHz, quad-core CPU supported by more RAM, makes it swifter.

Amazon could have installed a more powerful camera lens to put the tablet in an entirely different category. Storage expansion could have further enhanced the tablet's reputation.

Pros and Cons of the Amazon Kindle Fire 7" HD: 

The Kindle Fire 7" HD doesn't have any feature that could put it ahead of the HDX. The large 7-inch display is however quite useful when it comes to working around with documents or when watching videos.

The Kindle Fire HD doesn't have any SIM, restricting its functionality. It has a weaker CPU and just 1GB RAM. Besides, the pixel density is just 216ppi. The tablet lacks storage expansion and weighs 395g.

Specs:

The Amazon Kindle Fire 7" HDX is the latest tablet in the Kindle Fire series from Amazon. It has a 7-inch IPS LCD display with 1200x1920-pixel resolution at 323ppi. It runs on Fire OS 3.0 Mojito OS and a quad-core Krait 400 CPU that clocks 2.2 GHz. The tablet has 2GB RAM and is available in 3 storage options - 16/32/64GB. The Kindle Fire 7" HDX has a 1.3MP primary camera, measures 9mm in thickness and weighs around 303g.

The Kindle Fire HD has a 7-inch display with 800x1280 pixels @ 216ppi density. The tablet doesn't support any SIM and thus offers no talktime connectivity. It runs on Amazon's customized Android 4.0 OS. It has a 1.2-GHz, dual-core Cortex-A9 CPU and 1GB RAM. It is available in 16GB and 32GB RAM and features a 1.3-megapixel camera. The tablet measures 10.3mm in thickness and weighs 395g. It has talktime of 11 hours.

Talking Points:

Amazon released their third-generation Kindle Fire tablet, Kindle Fire 7" HDX in October 2013. The device also has an 8.9-inch version. The tablet received a CPU and GPU update in September 2014. Kindle Fire HD was released in September 2012. The SIM-less tablet achieved record sales of over 4.2 million in a single quarter in 2013. However, the HDX failed to match the HD's sales record. 

The Kindle Fire HDX has received a rating of 85/100 or 4/5 on most tech review sites. It has been valued as one of the best tablets in Amazon's tablet ecosystem. The tablet is especially noted for its high-end color accuracy.

Prices:

The Amazon Kindle Fire 7" HDX is available at a starting price of $179 on Amazon (https://www.amazon.com/kindle-fire-hdx-student-gaming-tablet/dp/B00BWYQ9YE?tag=latinpost02-20).

The Kindle Fire 7" HD is available from $114 on Amazon (https://www.amazon.com/Fire-HD-Display-Wi-Fi-GB/dp/B00IKPYKWG?tag=latinpost02-20).

Conclusion:

The Kindle Fire 7" HDX is a decent improvement over the Fire 7" HD. But Amazon could have made it an even better tablet by enhancing the camera power. The Fire 7" HD received a better reception, which the more powerful and better HDX couldn't replicate because of enhanced market competition.