Its on the turbine side the extra blade. I agree its mostly down to personal preference, however the Glanza is more expensive to insure, in my case by 1/3, this is becuase the data for the glanza has to be inputted manually as its not on the insurers database. The glanza's overall structure is stronger, theres a much bigger front impact bar and additional chassis bracing, stock for stock the glanza is quicker round a track but marginally slower in acceleration. I agree the seats in the GT are much better too.