I came across this article comparing Mac vs. PC machines specifically for video editing applications:
http://www.digitalvideoediting.com/2002 ... spciii.htm
It makes an interesting read. Cutting to the conclusion, it seems that the current cheaper single-processor PC architecture outperformes the more expensive dual-processor Mac.
Phade.Mac stalwarts will cling to the notion that Mac OS X is so much better and easier to use than Windows XP, but if you’re spending all day inside After Effects, which operating system you’re using makes little difference. What does make a huge difference is if you have to sit and wait for rendering any longer than necessary. And, according to our benchmarks here, if you have an After Effects composite that needs, say, two hours to render on the Mac, it’ll take you about an hour and 10 minutes on this PC.