What is the application?
I bought the laptop, I knew a lot of the time he will stand on my Desk connected to an external monitor, and issues of heating me to soar will not. The choice was obvious.
At the same time, a friend also asked this question, the choice of the younger models, the MacBook or MacBook Pro. So we had an argument were: battery life and weight of the unit...
Performance, top view. Believe me, in everyday life the difference to the eye between similar models you will not see, but the fact that it seems "a bit" heavy, "faster" sit down, you will have to overcome each time.
Performance, bottom view. By selecting a model with a weak vidyuhi and postoyanno attaching an external monitor you'll be thinking...
There's always a side view, just because I can't remember what specific differences there are now.