Used both since the W95 & OS 8 days, and definitely prefer the Mac OS (and the machines also).
I've had bad experiences with both, but even on the worst one, OS X is/was way, way better than XP ever was (or will be) on it's best day........
Simply put, IMHO, OS X is:
A) More stable
B) More consistent
C) Simpler underneath (command lines)
D) easier to learn & understand, even for newbies
E) WAY More secure
F) Easier to fix if/when something does go wrong
G) Was designed by people who care about design
etc
etc
However, having said that, and having taken the time to learn how to deal with most all of Windblows shortcomings, I
can still be reasonably productive using it if i WANT to, and unfortunately I don't have any choice at work........so I do it anyway, but that doesnt mean I have to like it!
And finally, I've already used Vista*s Pro on 2x brand new, maxed-out, top-of-the-line machines, and IMHO,if you think that it will solve/resolve any of the many issues w/ Windblows, you are in for a
H U G E disappointment !!!!!!
Yea it looks pretty on the surface, but it is
STILL the same crappy junk underneath, just more of it !!!