This bear is extremely good. Very fast, very good damage output, high hp/hp increase, high carry weight/carry weight increase, and comparable easy to tame. And they also fit in caves. I once saw a level 10 dire bear killing 2 level 5 carnotauros.
Faster than a giga, strong as a rex, with some levels can get to 1k carry, can gather and eat both berries and meat,can even gather fiber, if you tame a high level one you have a super gathering and combat mount. Unmatched in utility.
A high level can easily take down Alpha Carno's. It's perfect for taming other animals since it can collect both berries and prime meat. It can go through the central cave and is a highly speedy mount with good carry weight. It's also cuddly.