1. The computers were the same (Mac Mini 1.5 GHz) 2. The graphic cards were the same (Radeon 9200 64 MB) 3. The Quake settings were pretty much the same (no FPS-tweaking with .cfg file) 4. The difference is more like 100%, not 8% (140 FPS versus 70)
In case you're referring to the post #2 - it seems to me that Andreas was curious why a faster computer (faster CPU and much better gfx card) performs slower than expected. Soon (post #4) it turned out that the Mini doesn't live up to expectations too.