Aren't the RAM sticks interchangeable between a 15" 2.6 GHz i7 cMBP and a 27" 3.2 GHz i5 iMac? Both purchased in 2013 and use the same(?) DDR3 PC3-12800 1600MHz 204 pin sticks, right? Am I asking for trouble swapping a matched-pair of RAM from 1 machine to the other? Thanks.