I've noticed the same. Well - thought I must be imagining it, as the refreshed car is supposed to respond quicker than the previous one.
Car sounds good on startup. The "choke" on the previous GTS stayed on for longer, however the new one settles down very quick to normal idle speed. I suppose that annoys the neighbours less!
Seems easier to go unwittingly go faster in the newer car. I've found myself having to brake more often to bring the speed into check. Not worked it out check, but I I suspect the newer car is smoother and quieter. Or it could just be my imagination again.