Hi!
I haven’t had time to read all…
But you all seem to miss the biggest point here regarding performance. I just wonder why all MACs and OSX performance always sucks so BIG TIME? 
It doesn’t matter that new apple MAC PRO 2013 has 12 core or 24 cores or what ever, it will still run slower and get run over with simple I7 4core machine with Windows. Its a shame, all the component are like a monster machine but APPLE and OSX just don’t make it right. You all know that right?
So comparing physical hardware’s will not cut it. 
But like someone said here already that were a user, “you don’t buy MAC for its capacity”.
Best Regards
Freddie