Guys i have macbook pro 15" with 450 and its fine. i read a lot of treadht where all take the 460 and are happy. Now i have a doubt if i need take the model with 460 and return back the 450. With 450 i tried some games and they work good (Starcraft and heroes of storm) . I tried lightroom and photoshop without problem. QUestion: where i will find advantage if i take the 460? What are the really difference? Ad Exampl: i will have a better screen? I will have double speed for export a photo?