I strongly prefer Android to iOS, and I have both android (Samsung Galaxy Tab 10.0 and Asus Transformer) and Apple (iPad 1 and 2) tablets. One app I use quite a bit on the iPad is DirecTV. It makes TV watching a better experience by providing a nice interface to control your TV, search through the guide and movies, your recordings, and on-demand content and you can even stream shows to it. Contrast this with the Android version, which is a dumb guide with very limited features. It's really a night and day difference.
I think Android will catch up, but it's not hard to find examples like this.
Isn't this a difference in what DirecTV has implemented in their applications? I read the OP as asking for applications that do not function on an Android tablet or function significantly different on an Android tablet vs. an Android phone.
I think Android will catch up, but it's not hard to find examples like this.