FWIW, my view on the FWD vs RWD vs 4x4 debate is as follows:
RWD - utterly hopeless in the snow UNLESS rear/mid-engined as the weight over the back end helps. Then, tyres are critical.
FWD - on the whole, pretty capable in the snow if driven correctly, particularly if on suitable tyres. I taught my missus how to drive in the snow and she got pretty much everywhere over the last 2 years in her 206 on all-season Vredsteins. We live on top of the Chilterns, so get deep snow, and her job requires her to visit patients any time, day or night. The only time she got stuck was the car bottoming out on snow piled up at junctions - hills were not a problem, and we have plenty of 1:4 round here!
4x4's -certainly the best option in the snow (that why the best snow-stage rally cars are 4wd!) BUT can are very much "make or break" when it comes to tyres. The modern breed of performance 4x4's (RR Sport, Cayenne, X5, ML (AMG's particularly), etc) all come with sporty rubber. It's like a 4wd Porsche 911 - that's 4wd, would you expect it to climb steep snowy hills? Not really, yet it wears the same tyres as all the performance 4x4's I mentioned.
My RR Classic last year didn't get even close to stuck and was on mis-matched, worn tyres - two Toyo Transpaths, two mis-matched other makes, can't even remember. This year my new Classic has 4x A/T tyres, will be interested to see if they're better or worse - bring on the snow!!