iPhone 4 and 4s battery life

I know there are multiple posts out there about the battery life but most of the active ones are so off topic I figured I'd start my own. I bought my iPhone less than a week ago and I have found my battery consumption isn't what I expected. Having basically everything turned off (notifications, siri, wifi, brightness at the lowest etc) .... I get maybe about a day of standby and EXTREMELY light usage that equaled up to about 6 hours. My battery will even drop around 6-10 percent over night when i'm not doing anything and not recieving any sort of notifications to cause the phone to drop so low (I also close everything in the background)

I know people close to me that have the 4 and they play games often, phone calls, brightness is up, and other settings on and they get either the same amount or a bit more

I'm not really sure whats going on or what I should do...I was thinking of giving it a few more days and see my usage and what not then restore the phone and see if that helps before heading to the Genius Bar at an apple store.

I'm just wondering what kind of usage do others out there get?

4 and 4s so I can sort of compare the difference