5900 vs. 6600

Would a 256-bit 128mb nVidia PCX5900 beat a 128-bit 128mb 6600? I was looking at the core clock and memory clock and the PCX5900 looks faster. Just wondering, as I came across the PCX5900 for the first time. I have been gradually buying parts for my PC, and the video card is one of the last I need, finally.

stay with the 6600.. it has the better shaders, and ultrashadow 2.