Tbh, I don't think an OpenGL performance comparison is particularly interesting in the first place.
Though the interesting thing is that I did my own native Linux vs native MacOS vs Wine benchmarks with glExcess a few days ago. I got pretty much the opposite result. Granted, my benchmarking code was very primitive, so read the results as +/- 10 fps, and this was on fglrx. But I got remarkable differences between wine and native, with native beeing up to 2 times faster.
Out of interest I did a quick check on nvidia. The difference smaller, but there too(990 vs 1100 fps in the first glExcess scene at 640x480). Still a ~10% difference.
I also tested winelib vs PE .exe(with msvc6) and found no difference(That was 990(winelib) vs 980(PE)). The small differences could be because of my shitty benchmark code or because of compiler differences.
But I agree with Henri that a Direct3D performance comparison will be much more interesting.