I'm a diehard fan of the older S&Ws in the .44 magnum, and own two, but if I were choosing one today for hunting, I would seriously be looking at the Ruger.. The overall action appears to be a lot stronger, they are easier to mount a scope if you decide to go that route.
With the .44 mag., You can buy factory ammo or reload your own in a variety of configurations depending upon the desired effect of your shot and target. Meaning light weight bullets with large powder charges to effect impact shock value or the heavier bullets for penetration and wound cavity.
While the same can be said for the .357, I have to agree with Hammer about the .357 being a little light for killing a deer on a consistant basis. While never having shot a bear, I would definately feel better about having the .44 mag. in a face-to-face situation. /ubbthreads/images/graemlins/grinning-smiley-003.gif