Don't mind me asking why do you want to compare Windows index???
Run a proper cross-platform benchmark program, i.e. Geekbench 2 (I'm sure there are others) and you have a better idea about the relative performances.
I wanted to compare windows index to get an idea how it performs on windows 8/7. I currently use a PC (2009), but am about to get a macbook pro 13" retina. I was keen on comparing their graphical capabilities.