Whoa, déjà vu.
Seriously: worgs are basically winter wolves with the flavorful bits removed. They're a bit weaker, a bit dumber, a bit smaller, but for the most part the two monsters are identical. Even the skill bonuses are basically the same.
In my opinion, the 2 RHD lost make up for the removed abilities. However, I don't think worgs make a viable PC, except perhaps at very low levels (and even there, 'bite and trip' is becoming a less-than-perfect strategy). -0 LA.