I’ve ridden RTs and RSs with the same LC engine and they seem much quieter mechanically. I think the shape of the panels or the large echo chamber around the forks makes the noise more obvious. I recall a post from a year or two ago from someone who added sound deadening material to some of the panels to good effect.
I guess you can not "win them all".
On one hand some guys are paying out of their nose for systems that make their engine way more noisy, while others try to insulate and remove the noise