Kindle Fire HD vs. Nexus 7: Which one is right for you? | Android Atlas - CNET Reviews

Excerpt from a detailed comparison

"This is definitely a close race. The answer may have less to do with which model has the "best specs," and more with which one offers the better app ecosystem. In other words, if you're already invested in the Amazon mediascape -- with ebooks, music, and Prime video -- the Fire HD will likely have the edge. (The Kindle ebook and Amazon music apps are available on the Nexus 7, but Amazon video is not; nor is the Amazon Lending Library.) And if Google Play has some must-have apps you can't get on Amazon, that might be the tipping point."

Kindle Fire HD vs. Nexus 7: Which one is right for you? | Android Atlas - CNET Reviews