Obviously the Android Tablet. Anything Apple related is too loved in my opinion. Apple software in my opinion is terrible. You can't customize it without breaking their ToS, and Apple's lawyers lost against a couple of guys from sn0w when it came to a trial on jailbreaking the phones/devices. That shows how much Apple fails. "Oh em gee Apple is so good it can't be hacked and they're fast!". Apple is a stripped down version of windows with different files, more security, and is so easy for a virus to be made for hackers don't even want to give it the light of day.
With Android however, you can customize EVERYTHING. The apps for the Android OS are simply fantstic, and it supports flash. As well, I've never had a decently fast running iPad, but my Android tablet that I own is fast as hell.