I am a designer. Not of cars, but of machinery, and consumer goods, so maybe my eye sees things in a different way. Here is my quick list. 1) Basic shape. 2) Part line for the doors. 3) Inspection lids. 4)Interior door panels. 5)Layout of interior door panel hardware. 6)Cowl design. 7)Drivetrain layout. 8) Seat upholstery design. 9) Forward opening hood. 10)Front turn signal indicators. In my unbiased opinion as a designer, one of the cars designers, got a peek at the other design for a short while, and seems to have designed the other, out of a mental picture, a grainy spy photo, or sketches. Again, this is all based on my intimate knowledge of the S30 design versus photos I have seen of the 2000GT. Call me crazy.