Both Wolf and Bear are actually fun to play.
Wolf would be a safer choice and the one that would clear areas quicker.
Bear would be a funnier choice that you will hardly get bored of.
Since you're ladder (and not singleplayer), if you play solo in private games you can probably clean hell act5 half naked.
Both use more than 1 skill (compared to hdin), and therefore you can choose more ways of killing monsters.
You have single target attacks, aoe attacks, you wines can provide you with either life regen, mana regen or extra poison damage. your spirits can provide you with either extra life or extra damage.
there's a lot of possibilities and shapeshifter is fun char to play

Wolf only gets ias from weapon, unlike zealer for example.
You can go:
Phase Blade Grief + Stormshield to hit 5 frames Fury
For 2 handed either upped ribby or a Tombreaver (eth if you can get it) with ZOD + x2 15ias/adds jewels. 15/15 is nice for some extra resi