GB not MB
I don't think so. SSDs feel faster than HDDs mainly because the data access times are an order of magnitude lower (or more). SSDs compared to each other on this score are hardly different at all, the differences are usually more about how well they handle heavy simultaneous loads as well as raw throughput.
In terms of day-to-day stuff like Windows boot times and app start times, I doubt I could tell the difference between the slowest SSD I've used (except one piddly one I found in a netbook once, it took something like 40 minutes to install OpenOffice on it!!) and the Samsung 840 PROs I use these days.
(I've used the Samsung 830, Crucial M4 and 840 PRO)