"better" is a matter of perspective. The G5 chips just keep getting the innovations of IBM substrate R&D added to them. IBM is the only reason we still use hard drives because they keep breaking their substrate density record.
I look at the G5 and it's built in water cooled duel 64bit Risc processors and it is like looking at perfection for me. And you can't even hear the machine when its on, with 5 fans going inside. The first ones weren't as nice as now. Oh and the operating system, unix, uses the processors perfectly in multi tasking, in fact with a small script you can chain 128 or more of them together as one multi tasked cpu which works with the os perfectly because they are made for and around each other. I like an OS that isn't made up of pieces based on what information they had on all the different bios and motherboard known at the time the cd was pressed. Considering the U.S. Army went to Macs with OS X for their hubs because of hacking, I can't even feel more secure on a PC no way, no how. Just saying they have alot of good going for them and the whole battling over the machines is just childish.
*Edit* Schools tend to not buy for gamers

But I can say with certainty the mac works just fine for gaming, so long as the company didn't just try to do a shlock job making the mac version. They tend to just throw something together because they have the same "technology bias." In fact it is this bias that has lead to others not thinking the machines are worthwhile. The lousy software developers who just can't stand they have to make more than one version. What do you think is hurting linux? Same thing. It makes me sick because it isn't any less than racism or any other bias when you look at an open world with people and their choices based on what works for them.