First question to ask...are you looking at the small-frame concealed carry type revolvers or medium frame revolvers?
Like Alpo suggests, for home defense and/or hunting carry stick with a medium frame .357.
A lot more gun to soak up the recoil of full-power .357 loads.
Either the Ruger GP100 or the Smith mediums (K or L frame) are excellent choices.
My recommendation for trail gun carry is 4". That's about the perfect size to carry around and not get in the way.
If it'll be a primary hunting weapon stick with 6" or longer though to squeeze the extra velocity out and to get a longer sight radius.
If you're looking at a small-frame (Ruger SP101 or the J-frame size Smiths)...
Both brands are good quality, but neither will make an ideal hunting sidearm.
Me? Out of those two brands, I'm decidedly biased in favor of Ruger over Smith so I would choose a 4" GP100.
In fact that's what I bought for myself...but mom fell in love with it so she pretty much claimed it as her "coyote medicine" to carry during calving season so I gave it to the folks. I'm still shopping for another one.
Try out both of em at the store and go with whichever one feels right in your hand.