Well, you can see that the frame rates have gone up a bit compared to Windows98. The K7V is the performance leader once more and the 7KXA falls back behind VIA's reference board.
Somehow the K7V is able to smoke the competition in Design Review and Data Explorer. Those two viewperf-benchmarks are particularly memory bandwidth dependent and care less about the AGP-performance. It seems as if the K7V has a superior memory performance.