I have to say that so far their Apps Store is not what I thought it would be. They charge 4.95 for Angry Birds. We pay how much? 0.00?
The difference here is that Rovio released Angry Birds as an ad-supported app on Android; with a paid version being promised for the future (to turn off the ads). On iOS, there is a lite version and a paid version; no option for ad-supported. It's not really a fair comparison, as Rovio chose a different revenue model for the different OSes.
Overall, I find the iTunes App Store to be a bit easier to navigate around in and find what I am looking for. The Android Market is catching up, though, IMHO. And surpassing in some ways, automatic updates being a big one. The big thing with iOS is that there are alot more QUALITY apps. You don't see the utter crap in the iTunes store that you see in the Android marketplace.
I can't even browse games on my Droid without seeing crap like "Titties Shot 94" and "Rub Her Hip" - things that aren't even GAMES, just perverted crap. I was a bit appaled when I realized that the screenshots from some of these apps showed FULL frontal nudity (sorry, I don't have kids but my friends do; and I don't like the fact that they can see nudity without even looking for it). And don't even get me started on "devs" such as me4android who post nothing but ripped-off Java games from dumbphones. I report them time after time and nothing is done.