So basically, running Cinebench is the best 100% CPU pure performance test which you can run.
On the first run, here are the results:
That's a 8% performance difference after 1 hour of Cinebench.
This was followed 2 Minutes after it had stopped by one another 1 hour run (2 in total then) with the following results.
That's about 10% and you gotta remember, the MBA is fanless and the Pro runs the fans at 4000 RPM, which is noticably audible.
But I want the 10% *cry* I guess nobody can help me, personal choice. But I think just based on pure reason, I should go for the Air. On full load 100% CPU usage, the Air has a better battery life.
And since nobody would believe me, here I am, testing them against each other side by side at 3 AM:
They have a key cover on them from EeeCoo, I can eat my Pizza and don't worry about prints. One of them has to leave my house by Tuesday though *cry*
Reason tells me get the Air and anything else the Pro.
However, I would've chosen the Pro over the Air if I had scored 6600 points versus 7800 but after 2 hours of Cinebench, which is super unrealistic and hefty, the difference is 10% (7034 points versus 7805, maybe I have cought a well binned chip) and during a more reasonable hefty usage of 1 hour, the difference is 8% and the Air has even more battery life than the Pro, given that the Pro uses 25 watts under full load vs the Air max 15 Watts.