Alas, even those who prefer OS X must admit that sometimes Microsoft wins one. Safari/Windows has allowed side-by-side comparison of Apple and Microsoft's approach to font rendering. Both are defensible, but today Microsoft's is better. I suspect Apple's approach is a descendant of NextStep's Postscript display technology, which became OS X's PDF based display technology. Ideal for a very high resolution output, like 300 dpi printing. Not so good for 100 dpi screens.