Yeah those names do get confusing but they are just the build of the cores within the processor lines. They have different abilities for overclocking. But for instance sometimes they vary in specs, I remember when the Athlon XPs were out and they changed from the Palomino core to the Thoroughbred then the Barton. The difference in those was the jump in L2 cache which was higher on the Barton, and the front side bus speed.