Hi I've got a Macbook Pro (mid-2009) 17", 2.93 Ghz, 4Gb Ram with Crucial SSD C300 256GB as my main HD and a 500GB 7200rpm HD in the optical drive bay. Recently I bought a maxed out Macbook Air 13" (2.13Ghz, 4GB, 256GB SSD). Since I wanted to run pretty much the same stuff on the Macbook Air I created a SuperDuper backup of my Macbook Pro SSD, booted up the Macbook Air off this backup and copied over to the Macbook Air SSD. Everything went well and after some tweakings for networking, hostname and the likes I had everything setup and working well. Yesterday I noticed that whilst installing the same software on both machine (from a fresh boot) the Macbook Air was quicker! So I ran the AJA System Test on both machines and found out that the Macbook Air SSD was reporting quite even read/write speeds (~ 180-190MB/s) and the Macbook Pro SSD was reporting uneven speeds (~ 150 MB/s write and 210 MB/s read). So the write speed made a difference (makes sense when installing software) and obviously in this particular situation the CPU speed was irrelevant. Still I'm peeved that the Crucial C300 SSD shows that kind of behaviour. Note that this is using the 006 firmware I installed yesterday and I don't have measurements for the previous 002 firmware. I wonder if I should refresh the C300 SSD from a SuperDuper backup... Any thoughts about this?