As an illustration, this image is of the selvedge of Lochcarron's 16 oz Strome, the wrong side of the fabric:


This is the same cloth, the good face of the fabric:


Not too much noticiable difference in the pictures. The difference is only slightly more noticable in real life. Truth be told, in my experience some lengths of fabric I get are better than others in this regard. Notice, too, how they made sure that the tucked threads ended exactly where the green and black meet in the tartan, which creates a cleaner visual line.

And for comparison, here is a more traditional closed selvedge, on cloth from D. C. Dalgleish: