The 993 lines are cleaner and more sensual than the 964. Just like how the 997 is more beautiful than the 996. Not saying the 996 nor the 964 aren't beautiful! Far from it. The 993 is special to me because that was when I first started getting into Porsch...
To me it is like the yin and yang of perfection. you have to have both. However if I am granted only one keeper it would be 964 Carrera 4 Leichtbau the rest are just extraordinary