I've got an EVO and MX200 in each in two similar systems and cannot tell which is which without looking. While benchmarks will favor one or the other, the differences are so small as compared with the improvement over a conventional hard disk that the benchmark differences are, in my opinion, meaningless. You have identified two good products from two good companies, and I cannot imagine you will be unhappy with either product. I've used OCZ ssds in prior builds, and while I was generally pleased I had some problems getting the drives to be recognized and so now purchase only Samsung and Crucial drives (though my experience may be out of date). I have had no experience with Sandisk drives and have been disappointed with Corsair Force...