Naa, I'd rather purchase the 7 over this Mexican. With 620 bhp/tonne Caterham is clearly dominating over Vühl's 400. And Mexican's 0-100 time is 3.7 - 3.5 seconds, while 7's - under 2.8 sec. BTW, then come BAC Mono and Ariel Atom V8 and KTM X-Bow R that are even more advanced. I predict Vühl is no way a dominator right there.
And not just in performance Caterham 620R and the others are leaders. But, IMO, all they are much more beautiful. And I really doubt Vühl is anyhow more fun to drive than any another candidate.
And about the exhaust note, I don't think it might sounds thrilling, whether that's Ford EcoBoost.
And as far as I know, Vühl starts at £55,000. That's 5k more than 7, but Caterham, IMO, is a more impressive track weapon. And all those vehicles are too exotic. So, IMO, the only Vühl's advantage is the interior, but who cares about the interior affording a track toy...