I'm really waiting for the moment when I could compare, all in front of the others, the iPhone 4S, the Samsung Galaxy S 2, the Samsung Galaxy Nexus Prime and the top of line next Nokia with WP Mango. Amazing!!!
Apple put less processing power in their 4s on purpose. 512 mb is more than enough to run IOS and it doesn't kill your battery. Android OS isn't anywhere close to as efficient in that needs that 1gb to function and, combined with that big of a screen, your battery life is going to be terrible. Also, if you ever plan to deviate outside of Facebook uploads for the pictures you take on your phone, 8mp is absolutely necessary.