ATI Pixel Shader 2.0 calculated at 16/24-bit - Nvidia Pixel Shader 2.0 calculated at 32-bit, thats where the ATI speed comes from...

How many times have you seen texture corruption fixes for the latest games for Radeon chipsets? TWIMTBP/Detenator - No patches necessary, works out of the box - Catalyst/ATI Radeon patches ahoy!

I have both cards by the way. Nvidia spec as in my sig, ATI spec as follows:

AMD Athlon XP 2200
512Mb PC2700 DDR
ATI Radeon 9800 (256Mb AGP 8x)