Just to fact check...

Quote Originally Posted by ninja9578 View Post
Darwin is UNIX, so it has all the features of UNIX. The only difference is that Darwin was written specifically for multicore computers, I don't even think it will run on a one core machine.
That can't be accurate because Darwin has been around since Mac OS X v10.0 (Cheetah), which came out eight years ago. My parents have an iMac that came with Mac OS X v10.1 (Puma). Its CPU is an 800 MHz PPC G4, which needless to say has a single core.

Quote Originally Posted by ninja9578 View Post
but once the memory is allocated, OSX outperforms Linux because of it's thread and process management.
Not true. Depending on your X environment (e.g. any WM lighter than Aqua) and file system types (e.g. JFS), Linux can certainly be less resource intensive and can outperform Mac OS X. Edit: That's one of the main reasons I switched to Linux.