The text on that was justa tad out of focus.
I hesitate to provide information that lets you torture your computers even further, but, all things being equal, the Windows font rendering system (ClearType) places screen legibility slightly higher than faithfulness to printed output, whereas OS X's font rendering system (Quartz) places print faithfullness slightly higher than screen legibility. This is most apparent at small point sizes. Both systems can be diddled with.