nVidia GF8 series beta drivers performing just as good as XP?

I had this feeling last night before I went to bed that I should format my PC today and benchmark again XP 32 and Vista 64 with the newest beta drivers out there, so I downloaded the 162.22 beta drivers for my 8800GTS and I first benchmarked on XP Ghost Recon Advanced Warfighter 2 and Company of Heroes, and I was pleasantly suprised to see almost equal performance on both, here are my results:

XP SP2 Pro 32 bits Results:

2007-07-23 11:01:15 - graw2
Frames: 3102 - Time: 46200ms - Avg: 67.142 - Min: 48 - Max: 84

2007-07-23 11:03:54 - graw2
Frames: 2622 - Time: 39577ms - Avg: 66.250 - Min: 55 - Max: 83

2007-07-23 11:05:26 - graw2
Frames: 2649 - Time: 39660ms - Avg: 66.792 - Min: 56 - Max: 80

2007-07-23 11:11:55 - RelicCOH
Frames: 4942 - Time: 81430ms - Avg: 60.690 - Min: 49 - Max: 72

2007-07-23 11:13:48 - RelicCOH
Frames: 5388 - Time: 83682ms - Avg: 64.386 - Min: 53 - Max: 73

2007-07-23 11:15:43 - RelicCOH
Frames: 5040 - Time: 79616ms - Avg: 63.303 - Min: 53 - Max: 74

Vista 64-bits Ultimate Results:

2007-07-23 11:03:08 - graw2
Frames: 2747 - Time: 42030ms - Avg: 65.358 - Min: 50 - Max: 79

2007-07-23 11:04:09 - graw2
Frames: 2851 - Time: 41872ms - Avg: 68.088 - Min: 56 - Max: 80

2007-07-23 11:05:10 - graw2
Frames: 2641 - Time: 38847ms - Avg: 67.984 - Min: 53 - Max: 79

2007-07-23 11:11:21 - RelicCOH
Frames: 5341 - Time: 87179ms - Avg: 61.264 - Min: 55 - Max: 70

2007-07-23 11:13:30 - RelicCOH
Frames: 3907 - Time: 67179ms - Avg: 58.158 - Min: 54 - Max: 63

2007-07-23 11:15:19 - RelicCOH
Frames: 4828 - Time: 82603ms - Avg: 58.448 - Min: 55 - Max: 66


Settings all on Max @ 1280x1024 (Except textures on GRAW2, because it won't let me choose high textures due to my 320MB Vram)

My system:

E6400 @ Stock
2 Gigs of DDR2 533 ram
8800GTS 320MB @ Stock

I know it's not pretty with charts and all, but this showed me that I can use Vista 64 just the same as XP, that is of course, until I find some bug on vista.