Clearly, Amazon's just-announced Kindle Fire isn't designed to compete head-to-head with the iPad 2 on specs alone, but that doesn't mean consumers won't be cross-shopping the two this holiday season -- and that means a comparison is in order. Of course, Barnes & Noble's Nook Color is a more direct competitor, so we're throwing that in as well. Amazon's value proposition for the Fire comes from its vast, deep ecosystem and a highly-customized build of Android that CEO Jeff Bezos suggests will rock our world, so you don't want to read too deeply into these numbers -- particularly when the iPad starts at $300 more -- but it's something to keep in mind.