Do 'higher tier' cars give better stats?

So I've been using the Nissan GTR Egoist for the whole game so far and have unlocked all the mods on it and all the pro mods.

I recently got the Porsche spyder 918 concept and I'm curious to know that if I unlock all the mods on this car, or similarly any of the Most Wanted list cars, will they give better overall stats when upgraded or are all the cars similar?