PCX is a different bike, totally. Aside from being larger, the motor is bottom mounted vs top mounting on the Ruck. The PCX had PGM EFI and gets roughly 120 MPG while topping out at 70 and will run at 70 all day. Taller wheels of course. Pretty much everything a 250 could do in a lighter more nimble package with better gas mileage. There are aftermarket variators and weights that would let you get another 10 mph out of it as well as a program modification for the EFI that you can use to tweak you acceleration.