i heard alot aboiut both of these just wondering what would you pick? also what grain for black bear?

I would go with the 125gr Muzzy for Black Bear and the 100gr Muzzy for Deer.I use a 4 blade 100gr Muzzy.

My .02 worth.
I use 125 Muzzy for all except fish and birds.

BTTS
T

I have shot for years the 130 grain 4 blade Muzzy with GREAT results.