The RC600C has the same as Nordie body work fitted with twin headlights, then later they were fitted with rectangular the same as Nordies,
My Rc came with rectangular but I found a twin lamp nose cone as I wanted it to look a little different to the Nordie, I doubt there is any light advantage as standard, but more modern high intensity lights could be better
Keep an eye on fleabay, they do come up from time to time - - unless I bought the last one
John