Well, the biggest thing that bothers me is the cheese wedges are plastic. Then there is the plastic used on the gaurd for the oil cooler, the chromed plastic on the turn signals, the chromed plastic fork gaurds, the plastic dip stick, the chromed plastic bar end caps. There might be more, but this is just off the top of my head.
Lets see here.
Plastic facia on oil cooler....HD has no oil cooler.
Plastic gaurds for the forks.....HD does not have inverted forks on the RK...So no gaurds.
Both have crappy pot metal turn sigs....Not plastic.
Both have the same crappy grips from the factory. Rubber, and plastic.
Dipstick...Lets see...Metal transfers heat, and that means when you check the oil with a metal dipstick....you burn your hands
Now lets compare some realistic things.
RK has a non balanced rubber mounted non structural motor in an chassis that is better then before; it is still best described as flexible vs a counterbalanced, structural member mounted into a rigid cast box frame
RK has old school telescopic forks with much higher unsprung mass vs inverted cartridge
RK has 2 exterior mounted shocks vs a centraly located cantileaver shock