v6 255 every single time. Stunning looking thing in any colour, fantastic noise and way, way more special than a Focus RS. The performance will be even I expect, but one's a supercar, the other is a hot hatch with a truly awful interior!
Drive 'em both though, then see how you feel, but in my opinion the whole v6 experience will blow you away. It should be faster than it is really, it should be lighter, it should deliver more, but I don't care. The v6 is a truly special car, and I cannot wait to get mine!