Your best bet really is to watch the weather at both places and go to the one with better snow. Both are incredible but Whistler is a whole experience that should not be missed. I wont be able to go anywhere until the end of February; I have a full 3 day a week coaching commitment until then. In mid March, I will be riding in Alaska for about 15 days.
Fair enough, I guess for a sunday-tuesday trip I don't need to worry about any place selling out. I'll book our flights and figure the rest out when the snow starts flying!