At $50 more, you're getting a device officially sanctioned by Google, which means you don't even have to root it to put Jellybean on it. It comes with it, along with guaranteed updates. If your plan is to flash a ROM anyway, guaranteed development by all the major dev teams, because it's a Nexus, not to mention almost impossible to brick. It has a higher resolution, with a better GPU. You pay $50 more and you don't run the risk of wishing you had a better tablet in 6 months. I'd say Nexus 7.