It's all relative - both these bikes will handle tight roads within their limitations and more importantly the riders limitations. This summer I was in the highlands of Scotland on my RKC and we had a few days where it was very tight roads indeed - especially off the main routes - pot-holed, wet, windy, flooded in places, covered in sheep crap (and sheep) and very mountainous. Bike didn't put a foot wrong. My 20 year old son was on a 12bhp 125cc Honda and I couldn't stay with his bike in those conditions - he just ran away. And I'm not a slow rider. Between the King and the Glide - take the King.

 

As FDHOG said in post #7
ditch the windsheld and you get a realy fun ride

 

I've only riden a RG a few times, at dealer "demo days" and took one out for a test ride for a couple hours one afternoon. But, couldn't get used to the straight fairing. I've had a couple of soft tails, but really wanted to upgrade to a touring bike this time. When I rode the Road King, I knew that was the one. Very nimble, the new frame makes it handle like a much smaller bike around town. But, it has enough size and weight to be very stable on the highway. Plus, I love that retro, cruiser look.

Can't get any better than a Road King.

Mike

 

On paper the RK should be the best handling of all of the touring bikes. It is lighter with a lower center of gravity. Still it is usualy the rider, not the bike that is the limit for speed in the corners.

 

SG is lower than a RK

 

Exactly.

 

The FLHR/C is very nimble for a big girl, she is great on twistys and mountain roads.

 

this summer we took a 4 day 1650 mile round trip to the BlackHills S.D. several hundred miles on some real tight twistys like Iron Mountain and Needles Highway my RoadKing did just fine .was a blast

 

Took me a loooong time to get my Road King. So I'm in no hurry to ride it like I used to ride. Just the thought of replacement costs brings me down another 10mph.

But I have no doubts the bike will do anything that I myself am not willing to do.

 

I have the RGC and I will say it gets my vote.

As best I can tell, all of the touring models have the same frame, so it should come down to the accessories, which may or may not be the same.
I chose the RGC for two reasons,
1. The wind doesn't shake the handlebars around when you pass a truck or get blasted with a cross wind.
2. I liked the way it handled, it was the most nimble of all the big V twin's I rode, but that is a personal opinion of mine and you may not agree.

Before the RGC, I was on a Heritage Softail Classic, and I drug the boards turning onto the on ramps of the interstate.