So if I understand correctly, your on pace to get 14 hours of streaming music and browsing the web and your NOT happy? Please dont tell me this was your first couple days too? (Battery should improve a bit after the first week). If I get 14 hours with my Thunderbolt of just hanging out in my pocket I am happy. The processor clocked higher, the screen is bigger and there is more RAM (which is always running pretty much) so YES this will have less battery life than the iphone.
If your going to be upset at 14 hours of streaming and web then the iphone is probably better for you.