the rhino can tank much better than a bear imo. of course, crowd control is a different story.

while buffed, the rhino can outlast a series of attacks while dodging and barely any damage is done. if damaged, the rhino can just regain health with heal.

bears are great at tanking also, i agree. but i notice bears being damaged easier than rhinos, possibly because of the difference in tanking buffs and the +45 (or around that) level 9 heal the rhino has. the bear will always remain the superior crowd controller though, unless he's a scatter bear