how come everyone says that convertible weighs more than coupe, i am sure this is true. but when i look at the GVWR weight both say the same number, on the srt6 it says 3,870 lbs on both coupe and roadster, i thought roadster would be around 4,400 or 4,500 lbs? so that would also mean the coupe is a faster accelerating car...am i wrong?