Having successfully installed Mac OS X 10.4.11 on my 8600/250 (as detailed here: http://forums.macrumors.com/threads/604ev-tiger-and-geekbench.1962898/), I thought it would be fun to compare the speeds at which my 1GHz DP Quicksilver and 250MHz 8600 boot the OS. They have the exact same OS, as the 8600 drive is a clone of my Quicksilver so it's totally fair. The slower buses are the biggest downside to the 8600 of course. And of course the enormous difference in CPU power. 840 vs 95 in Geekbench 2! However, in terms of HDD's and GPU's and RAM, they are actually fairly equal. At least on the surface. Again those buses and differing memory speeds are a massive factor. Anyway enjoy the little video I made comparing the two!