From what I can gather, its honestly all down to 'now casting'. Yes, the models may say one scenario, the Met Office say another, the BBC forecast another, the more knowledgeable members of NW yet another scenario. None of which will be correct until after Saturday Night/Sunday Morning.
Stay positive, its looking likely (atm) that we should all see some snow. It seems to be amounts that is posing the problems (and that is down to now casting during the course of Saturday Night, no matter what the models 'predict')