A predator call is a predator call for the most part.
A bear will come in one a cottontail distress call....just the same, a coyote, bobcat, or cougar would too...so don't get too hung up on that.
Cub in distress would be more bear specific, but be aware that often times those will call in sows (usually after they send their cubs up a tree)...so pay close attention.