The intel/samsung will have slightly better performance, not that it really matters. I have an m4 that I'm extremely happy with, that's the only reason I included the crucial. I wouldn't say the corsair or OCZ are "bad", but I've heard nothing but good things about the intel and samsung, I can't say the same about the corsair or the OCZ. I know earlier generations of those drives had issues. From a reliability standpoint, I would go with the Intel personally.