i cant rationalise how someone can look past the actual output of the engine and focus on the size of the turbos.
if these two little turbos are getting the job done up to 420whp then they must be much better than their size indicates. that says efficiency to me.
bigger is not always better.
if and when i own one of these cars i would have no problem keeping those little puppies on there and doing all the easy upgrades to get to 400whp… if you want something silly fast you shouldnt be in one of those cars anyways.