I guess if the question is; which is a better platform for recording the answer is either. Both will do a fine job.
From a user perspective, the Mac is the most elegant user interface out there. If you are a PC guy and you have never given this OS a real examination, (like several weeks, not several minutes) you may see the wisdom in what those fine people at Apple have come up with.
Here's something telling, not only has Apple been the trend setter in GUI and OS design and functionaliy (I can't imagine how Windows wasn't a copywrite infringement on the Apple OS, but that's what the courts ruled in 1988), but they have set the trend for mechanical design, Remember the transparent case with blue plastic, not only did PC makers follow their lead, but phones, staplers, you name it. The design of the case for the G5 is nothing short of fantastic, both visually and fuctionally.
As an artist, I just get Apple's world view, I think it is more in line with the way I think and work.
I'm surprised that on this forum that there are as many musician PC lovers as there seem to be but a PC can make a fine recording too.