^what TS said, first reply^
Or Marvins advice, very sound. Can't compare Apples with Apples until they release the new ones.
Wait if you can - I couldn't and pulled the trigger on a MacBook Air 1 week ago. Looked long and hard at the old cMBP - had to make a call.
13" 1.7, 8 Gb Ram cto for my wife who needs it for work while travelling in two weeks.
Should arrive tomorrow.
If I could have waited for the refresh to rMBP I would have.