Android IMO is more customizable and hackable but iOS has cydia which is really nice. I own the droid, the ipad 1, and the ipod touch 4g. Both are jailbroken and customized like crazy. The iPad 2 will probably be a tehtered jailbreak at first until a untethered one is found. When a untethered one is found it probably won't be released until the iphone 5 comes out. I just hate how jailbreaking slows down the device like crazy. On android it usually speeds it up. I know a lot about both worlds.