Heh, I was about to write the same, only I have the former. Haven't had the privilege of making a comparison, so ... I would assume both are good. I've heard people say PC cards often have poor cooler mounting pressure and thus high deltas between edge and hotspot temperatures - but I don't know if that is limited to air or not. Mine maxes out at a ~20-degree delta, and that's only when I let it run hot. That's not great for a water cooled card, but definitely nowhere near problematic in any way, nor anything that's likely to affect clocks, longevity, or anything like that.