i outgrew mustard slathering ribs and butts.
I'm trying to drop that one...
for me, doing a bunch of large catering jobs really helped.
one time i was smoking 8 butts for a big graduation party. halfway through the prep I ran out of yellow mustard.
with only half of the butts mustard slathered, I decided it was the perfect test to see if it really makes a difference.
i kept them identified and gave them equal smoker distribution.
when I pulled them, I kept them separate as well.
The ONLY difference I could find was the texture of the bark and it was incredibly hard to detect. I couldn't taste any difference (and I'm a super taster)
I asked several of the party goers which one they preferred - none could tell the difference