Although they are very common nowadays and they all seem to offer pretty much the same functionality, USB flash drives can actually differ in a number of ways. In this USB flash drive roundup, we take a close look at the features and performance of a 4GB OCZ Rally2, a 16GB OCZ Mega-Kart, a 1GB Kingston DataTraveler ReadyFlash, and an 8GB Corsair Voyager GT. Head on over to the site and check them out. You may be surprised by what you see.