One big difference (besides how they look, i.e. curvature, dot matrix, etc...) is HOW THEY FIT.
I will be the first to admit that some brands of GT sail panels are indeed quite flat. So much so that when you install them
you'll notice that there are areas along the edges that dont quite sit flush. This is where you must "double-up" on the 3M tape
in order to get the desired thickness. I had to do this on my 86 GT when I installed a pair of Kahine's sail panels.
I got them a few years back when they were $110.00 plus shipping.
Kit