Hello, For the week end i've the 1.1 and the 1.3 in front of me ! So i can do some test with the two If you 've idea to test something to see the real difference between the two i'm very open !! *The benchmark with the same thing installed (spotlight index is done and permission clean) : 32 single & multi : 1.1 : 2233 & 4090 1.3 : 2583 & 5170 64 single & multi : 1.1 : 2440 & 4597 1.3 : 2871 & 5797 *Logic pro benchmark test (cf. http://forums.macrumors.com/threads/tried-the-new-macbook.1887830/page-2 thank to tbirdparis) 1.1 : 28 track stables 1.3 : 34 track stables If someone have a good project in Xcode to test the compile time or other Shoot !!