Bruce

As of today's date, I completed the murder mystery questline on both my alliance and horde toons and when I finished it on my horde toon, I can confirm you get the same exact item as it showed me as already learned. Why is this relevant you might ask? Cause even if I have the mount in my mount tab, its still the blue tint variant I learned from my alliance toon, so I thought going through the questline might reward me with the red tint variant, but no, doesn't seem to be the case and horde players will be stuck with the blue tint variant as well.

Unsure why they don't just change tints between factions but as of today that isn't the case, hopefully they will change this in the immediate future.

Hey guys!
I have searched a lot on the web and all the info I found was Alliance only... for a moment I thought there is no Horde version.
The Bruce starting quest appears from the quartermaster after you win your first fight!
Note FIRST FIGHT, not rank 8 like previous seasons.

Detailed guide here: https://www.wowhead.com/guides/brawlers-guild-bfa-rewards-shirts-murder-mystery