Ridden back to back the GSA's configuration is better.
The adv's lower 1st is much better.
The screen with tobinators is better.
I prefer the GS 6th, the GSA's is a bit short.
You may find the the 1150 a bit wheezy after a twin cam.
The 1150 was a great bike once, is still a good bike now, and is good enough for most people most of the time....but it's outdated now and it feels it.