BB versions cheaper to buy and fuel.
Higher fps.
Pellet versions more accurate but they seem to vary.
My nickel one is spot on.
Black one shoots to right.
Pellets easier to load without removing shells and can be used at Clubs.
I think I prefer the pellet Webley to the BB version.
But I am happy with both versions of the Colt which lends itself more to can blasting than target work.