Judgeing by Vauxhalls build quality it should be poor, however if I was in the market for that sort of car I think I would rather have one of them opposted to the Fiesta ST, sadly Ford no longer offer anything like they used to (I.E for those in the FI market) and missing out on a huge gap imo! Doubt there as fast as a Cosworth, they have slower 0-60 and top speed to start with plus they don't have near the torque of one, only similarity I should think is the power!
Martin