If it's mostly you riding and gear on the back,. go with the short because it looks better. If you go 2 up, get the taller one for passenger comfort. The Corbin will work fine with either, with the short bar the pad will be a few inches over the seat top. The rack will be about level with the top. Your luggage will strap on tho the rack with no problems, but will probably hug the tall better.
Me? I have the tall now, had the short for a couple years before that. My wife likes the tall much more. I have a Nelson Rigg pack that works great on the rack with the tall, but it worked just as well with the short.
Short bar with rack....


tall bar without rack (its now on a shelf)....

