It depends doesn't it? No one really knows what a 4c or the v6 exige is going to be like.
4c has it on looks, interior (if its anything like the concept) and low weight - question marks for me are reliability, handling and weight distribution. Plus will it actually make it to the road in anything like the form it has now.
Exige has it on proven handling, power, reliability - question marks are weight, weight distribution, looks and that cost, which really is a bit on the steep side for what you'll be getting. Personally I think this will struggle to match a honda'd S1 or even S2 elige both on the road and on the track.