I owned a Voodoo 3, while all my friends had TNT2's. My experience was the opposite. Not sure if it was the handling of anisotropic filtering, or some kind of texture filtering - but my Voodoo 3 was notably sharper on all the games of the time.
>>dbspin+(OP)
It may even vary depending on the game, the settings, whether D3D, OpenGL or GLide were used or which versions of the drivers were installed.