Well all of the Geforce DDR cards use the same exact Nvidia reference PCB design, the same 6ns Infineon DDR RAM, and the same Geforce 256 GPU unit. One would also probably choose to use the Nvidia reference drivers, too.
The only real difference between the multiple brands of Geforce DDR cards is the heatsink, games bundle, and extra TV features or lack thereof.
Does that answer your question?
BP6, Celermine 566@850, 320meg, CL TNT2U 175/220
BP6, P3-700@770 (for now), 320mb, eVGA MX Plus (dual CRT), waiting for VIVO module