As a MacOS virtualizatiion user, I appreciate the value of these comparisons. But the graph coloring is crazy-making.

First each product has its own rainbow color, then everything is blue, then BootCamp changes to VirtualBox's purple, then Parallels8 takes Parallels7's blue and BootCamp takes Parallels8's green?

Please, please, please use consistent mappings of colors-to-products throughout your graphs.