[Spiritama]

Its easier to take a light car and knock some power into and turn it into a beast, than it is to take a heavier one and do the same.
The FR-S is going to be great out of the box and amazing in the hands of peps with tuning abillity because for each HP squeezed out the gain is amplified by the low weight.
The GC is enormous and for some of us that isn't our taste when it comes to fun to drive. a smaller car generally has a lower center of gravity and is more fun in the corners. The GC in the overlay is WAY above the FR-S.
It depends on what personal preferences are. The GC might be a tad quicker on a drag run but its weight will do it no good compared to a car 500 lbs lighter that hugs the ground.