An aluminum flywheel in a Cobra also lends a certain margin of safety. When you're moving up fast through the gears, a quick shift, at say 5500 RPM, into third will bust your tires loose a little faster with a heavier flywheel. A lighter flywheel will be slightly more forgiving -- sometimes you want that.
Personally, I always prefer to be forgiven; especially in the Cobra... thank you very much.
