some of the things that make a van great for winter/foul weather camping are:
you don't have to exit the vehicle
with a pop top, someone can sleep above while someone else moves around below
you can really do a great job with insulation of the walls & top
getting up and moving around it is easy
stealth mode when you don't raise the top
Sportsmobile builds a killer van
If you can do without 4x4, especially if you don't plan on running trails in the thing then I would get the Sportsmobile Sprinter van as you will have a ton more room.
If you do plan to offroad then get the Ford but with 4 captains chairs so everyone has space and a place to relax.
cigar smoking, wilderness first responding, ham talking night nurse who is overland certified and a fellow of the Royal Geographical Society.....
now everyone say "so what where have you been lately?"