Halifax or Montreal? Which is best for a weeks holiday?

Canada - I loved Ottawa for its relaxed chilled out feeling. Fancy Canada again this year but can only go Nov/Dec so out of Halifax and Montreal which is best for a weeks holiday if we base ourselves there but do not hire a car? Need enough to do for a week in terms of sightseeing and good transport to get out into countryside if we decide on it. Also, as we going in Nov what are the chances of snow? Had it in Sault St Marie in Oct last year but not much and wondering if this was a one off? I love the snow although not bothered about skiing etc.