Setting the Kindle Fire and Nook Tablet side by side, we see that the Nook is just about a 1/2" longer than the Fire. Perhaps this is the result of a bulkier case to accommodate the awesome carabiner clip? Or maybe to squeeze in that extra 512 MB of RAM?

The Nook opted to have its micro-USB port fly solo on the bottom, unlike the Fire, which also placed its catch-all button and head phone jack alongside the port.

Hold that pose, fellas. Yep, just what we thought: the rounded sides of the Nook are deceptive. Even though it looks skinnier than the Fire, it's actually a hair pudgier. The Fire measures in at .45", but the Nook is .03 inches thicker, at a mind-blowing .48"!