Share 'OS X System Access'

So, i maybe will buy a macbook pro in the following weeks. I want a notebook which isn't in pieces after one year and I think that Macs have a pretty good quality. Now, I've some Questions about OS X: 1) What can I do on Linux, that I can't do on OS X ? (unless the editing sources) 2) Can i use the HW Devices as in Linux? 3) What is the biggest problem of OS X , in your eyes? Sorry for my bad...