I coulden't feel any difference to be honest but maybe i am a 🤬 driver.They were already different before, I'm not sure if it was GT5 or GT6 (my mind pretty much combines those two) in which I tested them all back to back and there were noticable differences. The BRZ was the understeeriest, the FR-S the oversteeriest, and the GT86 in the middle. No idea about Sport though.
I know they are but i can't test properly in GT4 and in GT5/6 the V-Spec ii is a premium so it woulden't be fair.Nobody would think there's any difference in them, a classic duplicate case.
Like i said to Famine i don't know about licensing and if thats the case its understandable. But then this brings back the question why do most modern games since the late 2000s offer a livery tab instead?.It's not technically a different car from a mechanical point of view, but is from a licencing point of view. What you missed in this exercise is that for cars like this you often have to obtain licences from the manufacturer, race series organiser and the race team themselves, and that ties into how they have to be shown in the games themselves.
Please elaborate if you have the time.(among other things)