I doubt there is any real difference....but the redesigned rear suspension might have resulted in a bit more space...no idea really.
I've driven the white and burgundy demo cars and compared to the driving position of my Plus 8 (Super Sport Chassis): in my view there is no difference.
The seats look exactly the same and feel the same. You can gain a few cm extra space with the Tillett seats , but I don't find them at all comfortable.
I'm 1.73m and weigh, i believe, 82kg.... the seats are snug. As the car is an auto there is plenty of foot room.