Check out this video comparison showing the performance of the iPhone 3G on iOS 4 versus iOS 4.1.
Lifehacker posted the following results:
● Messages: iOS 4.1 Wins (By a Little)
● Maps: iOS 4.1 Wins (By a Lot)
● Photos: iOS 4.1 Wins (Just Barely)
● Safari: iOS 4.1 Wins (Just Barely)
● Messages: iOS 4.1 Wins (By a Little)
● Maps: iOS 4.1 Wins (By a Lot)
● Photos: iOS 4.1 Wins (Just Barely)
● Safari: iOS 4.1 Wins (Just Barely)
While the speed advantages ranged from marginal to significant, iOS 4.1 clearly outperformed iOS 4.0. It's still significantly slower performance than you'll get from a 3GS or iPhone 4, and we're still not sure it's a big enough improvement that 3G owners will want to ditch iOS 3. The most obvious difference was UI responsiveness. The UI didn't get stuck nearly as much on an interface element or when trying to enter text. If you are set on using iOS 4, the upgrade is worthwhile for that alone.
