Hi,
I have used the GT, Sebile/Slim beauty & Bob Sands knots for a few years now. They are all very similar knots but without doubt the Bob Sands knot is the smallest, strongest and the easiest to tie.....especialy when it comes to thinner lines and braids. The GT is the most difficult to tie when you are working with small diameter leaders and braids. I now only use the Bob Sands knot for all aplications where braid is tied to leaders and find it a fantastic knot in saltwater flyfishing applications.
MJ