Check out this Official's Choice black shirt:
The piping is thick, rather than the pinstripe that it's supposed to have. Their first run of shirts had a slightly thicker-than-standard stripe and it was passable, but these are twice as thick as the first one, and distinctly non-standard.
This matters to one assignor around here, but does it matter to you if your shirt doesn't match your partner's, even though it's the same color?
The Official's Choice guy said that he's going to change the way umpires dress one umpire at a time. I wonder if he changed that first umpire yet.