Which brand of science are we talking about ?
The silver can be either, the red is non-ABS only iirc. Someone else will correct me if I'm wrong.
The correct answer is: the silver is the faster one. (Owner of a non-ABS 2010 Silver)
It's elemental my good sir!
Gold is used to make red paint, and gold's atomic number is 79. Silver's atomic number is only 47, on the other hand, allowing the silver NT to be muuuuch lighter (and faster) than the red one. QED.