I actually have both of these devices and still can't decide which one I like more. They both really have their own benefits.
iPad 2:
It has Apps. I mean being that iOS has been around a lot longer they have had time to get far ahead. So if Apps are your thing and you don't want to find work arounds or be adventurous then iPad of course is the way to go. The iPad also looks very sleek and stylish. I mean Apple sure does know how to make a quality looking product.
Asus Transformer:
Customization everywhere! I love being able to see most of the stuff I want to know right away right on my front screen. I am able to see my calendar, Twitter, Facebook, Google + posts, and many other widgets. The widgets really make Android fun and useful. Instead of always having to open an app you can just see so much from your different screen. You also get some free services like Google Music and Amazon Music that are amazing. What really bums me out though is that still to this day I don't have access to Netflix. This really bugs me because I feel like Google should be on a company like Netflix's back to get it working on all their devices. I understand not having all the apps iOS has but the big ones should be there. It is a big deterrent when normal everyday apps are not on it.
What I normally see is people who just want a device that works they get an iPad. If they are adventurous and are in it for the long haul they get Android. Or maybe they are just trying to rebel from all the fanboys haha
This has been a tough decision for me so I have just been keeping both!