FYI - Stock rear glass has the same black outlines if you don't have the privacy glass. Also, the gaps around the glass are pretty much the same as this new design.
I am 6'3" and 210lbs with 34 waist, 34 length pants. B10XL fits like it was made for me. Also, as Steve mentioned, added clothing like a thick sweater or jacket changes fitment. Love the fitment of mine and would not want the smaller size at all.