I did indeed go to the Road 6 13" bars. I liked the handling of the KST's but no one on the forum as far as I know has said anything about the difference in clamp height on the Rushmores compared with the older models. My buddy and I got the same KST bars last year @ Biketoberfest in Daytona. He has a 2013 RG and I have a 2015. We compared clamp height and it appears that the Rushmore handlebar clamp is ~ 1" lower than his 2013. Going back to my 2012 RG, I had 12" Wild 1 Outlaws and that handlebar was perfect for me. The Road 6 13" is about as close as I can get to the 12" Wild 1 Outlaws. Plus, I like that old ape hanger style with the curved bends.
I like the Wild 1 12" bars so much I put them on my Sporty. All the bars I mentioned are great but I'm doing a little fine tuning. Also, I hate using the Rushmore clamps. They are unnecessarily heavy. With the KST's, they didn't have the clamp holes so I used the older style clamps (about $12 as I recall).