For small ensemble Jazz (trios etc), or the older style Big Bands,
My tendency is for UB (I like the dynamics/note decay better).
Heavy Big Band Jazz/Latin/Groove styles, I like the attack and punch of the EB better.
These days, in Jazz people don't sneer and spit,
Although they might do if you don't know the changes and forms....lol..
I still see 'fakers' trying it on, hiding behind muddy indistinguishable sounds,
thinking they are getting away with it.
If you are turning up at Jazz blows, or want to get into regular Jazz gigs,
spend some time learning a lot of the popular tunes used (great ear practise anyway),
rather than worrying about UB vs EB warriors.
It will set you up for moving onto more adventurous projects.