Performance differences on benchmarks, certainly, and I'm sure on certain types of workloads. In "typical" uses, not really, especially when compared to a mechanical HDD. A double-digit performance difference that amounts to a fraction of a second simply doesn't matter. I do agree that for those certain workloads where it matters, where time is money, a professional will need to focus more on those benchmarks.
OCZ has lost my trust for a pattern of decisions, from PSUs that review well on day 1 but fail early due to substandard caps, to the way they handled the change to 25nm, and more recently the fact that a lot of their [Sandforce] drives had major firmware issues that were bricking drives. What else do they have that might fail, and how? When I can buy a Seasonic, or a Crucial, or a Mushkin, or a Samsung, or ... and be certain it is going to work (given that anyone can have an occasional DOA), I just don't see a need to risk OCZ.
Please don't misunderstand, I'm not lumping them with Crappermaster and others guilty of willful dishonesty; OCZ might earn my trust again someday, it's just that they've been relying on their premium name but have stopped delivering premium products.