Mga GT mas luxury tourer than sports car. Generally,

1.) Sports-sedan-soft yung suspension. Think a Ferrari (Sports) vs Maserati (GT)
2.) More lux accessories mga GT... therefore, heavier.
3.) Powerful engine like a sports car but detuned... therefore less NVH and less performance.

Think Aston-Martin, Jaguar XK, MB SL-class, BMW 6-series, 996-997 911s, Maserati 4200, etc... parang laid-back luxo performance.

Basically, a sports car is more on performance with less priority on comfort. Low center of gravity, short, stable (and therefore, stiff) suspensions, aggressive cam timing, etc. All this give great speed and handling... but bounce your body around a lot, even as your senses are thrilled .

That's also why you have to contort yourself getting into any Ferrari (2 seater, that is) or Lambo. Porsches are more forgiving sports cars, but medyo GT na rin these days ang 911-997... kaya siguro may Cayman S.

That Koenigsegg in your sig is a sports car. So is the Miata (it definitely isn't about comfort, and performance is very good considering such a small package). Same goes for a Skyline GTR, but not the 350Z (too soft, no offense to owners).