Rendering Xeon Or I7 Mac Pro 2.66 Dual Core Xeon Or PC I7 Pc?

Mac pro 2.66 dual core xeon or PC i7 pc? - rendering xeon or i7

This is one of the hardest things I had to choose between, this is for the provision of Maya ... I really want a Mac, but that's the price to performance. Mac would take longer, Xeons are higher? I need some advice