Comparing OCZ's Vertex and Agility series would be very interesting since both products are priced almost at the same range and their specifications are matching. We used exactly the same testbed for testing both drives.

The graphs showed that the Vertex series is faster in the reading and especially the writing part:

Testing the drives with real applications showed higher differences in favor of the Vertex 120GB series. However, the majority of users won't notice them after all: