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Crucial seems to be religion around here, I've noticed. I've got 32gb of Corsair in my machine and haven't had any issues so far, so I'm not sure it matters?
 
Crucial has generally been known to be better stuff, as Micron Technologies has had a longer history and one of the first big semiconductor manufacturing companies. Corsair historically was seen as a lower end brand until recently when they've really picked up their game.
 
I have used Crucial and Mushkin both..

The Mushkin is USA made (at the base of the Rocky Mountains in Denver, Colorado) often cheaper, has been installed in my past 3x MBPs as well as a friend's iMacs, and has a great Warranty as well..

No Troubles with either of these Manufacturers, so I will recommend both to anyone!! :D
 
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