Exact same app on both? Same price? I ask because people expect Android apps to be free whereas iOS owners are conditioned to pay. Gotta compare like with like. Same app, same price, better functionality on iOS. (I realize the first two won't always be the case)
I'd admit that much of this comes down to personal habits and personal views on these portable devices. I'm a snob....I want the best sounding MP3/music player, the best application environment, etc. Everyone is different.