What's best for emulating Dolphin/Pcsx2? GTX 570 or HD 6970?

[tuanming]

This thread might seem fruitless, but I'd really like to know which card would benefits the most from emulating Dolphin or Pcsx2. The GTX 570 or the HD6970? Both GPUs cost just about the same in the US. Yes, I do know that both of these cards are powerful enough to run Dolphin and/or Pcsx2...but still, I'm curious as to what the dolphin developers have to say on this or people that know what they're talking about, or if you currently own one of these cards. But what the heck, feel free to state your opinions.

In Pc games, it's a back and forth game; some games prefer AMD (formally known as ATi) and some are optimized for Nvidia. If I were to used the Pc games as a reference as to what card is better, then there's really no way of telling them apart because the games sometimes favor one brand over the other. Therefore, it's hard to make a decision based on the fps of each pc games.

Since we can't base the emulation performance on pure fps from pc games. The next step is looking at each card specs and then try to deciphers the specs. Since the dolphin developers made dolphin, I'm assuming that they should knows what's best for dolphin.

GTX 570 http://en.wikipedia.org/wiki/GeForce_500_Series
Radeon HD 6970 http://en.wikipedia.org/wiki/Comparison_of_AMD_graphics_processing_units#Northern_Islands_.28HD_6xxx.29_series

Discuss...