I'm not a real hardcore goose hunter; i cant tell you exactly how they sound. I think I can help a little however. In duck calls, a wood call has a much softer, more nasally tone to it. However, wood tends to swell around moisture; keep that in mind. Acrylics/polycarbs are denser than wood, won't swell, and have a much sharper and louder tone to them.

I'm pretty sure that the same tone characteristics apply to goose calls... after all the stuff the call is made of doesnt know if it is a mallard or a goose call... it'll react the same as it would a duck call.

I have a Zink power clucker PC-1, and that one sounds decent. My buddy has a buck gardner, and that one has a good tone as well. If you're looking for a high dollar goose call, look at Jeff Foiles goose calls... those sound excellent.