Mac In general is a Better PC/OS then a PC/windows machine, this is due to stability and ease of use. The fact that macs aren't as compatible and almost all macs are alike. Apple is very strict about what hardware and software can go inter there systems and they make the computer and the OS. where a PC you have much more choices as to hard software and OS. So while an Apple is a more stable and easier to use system. PC's are more compatible and give you near unlimited options. Microsoft does not make computers.
SO……………..
1)MACs are more stable and easier to use. they are also less prone to problems. However your choices as to software, hardware, and upgrades are very limited due to the controlling nature of Apple. Remember they make the PC and OS. Apple also decides what can go on the machine both software and hardware wise. MACs are very preparatory.
2)PC's are the most compatible and upgradeable systems. You have allot of choices when it comes to hardware software and operating systems. you can even use a different brand of cpu. however due to this PC's Specially with Microsoft windows based Operating systems, tend to be less stable and harder to work with specially since they have many many more configuration settings and options.
I like Macs, I think they are one of the best made computers you can buy and there also the best when it comes to beginners. however all my games and Applications run on windows. and I have a self made custom system. I can't do everything I want and need to do on a MAC. I can however Do it all on a PC. I can also run multiple OS's on PC even from different venders such as a win98/xp/linux multi boot machine. so it's more of a personal preference and need as to which is better.