The main reason I don't like UK winter is that UK winters tend to be very dark and gloomy. Very little sunshine. Very short days i.e it starts getting dark around 3.30 PM in December and we get very low dark clouds pretty much every day with windy and drizzly weather. Even days feel like nights.
Similar situation in Canada as well.
It does get cold, but it hasn't snowed much for last 3 years. So far I have not had any problem with the cold temperature. I did not hate it even when it was -8 C last winter. But I did hate the fact that I did not see sunshine for almost 2-3 months! Get ready to get for -30C to -40C, with lots of snow and few snow storms.
Plus I feel people in the UK don't tend to embrace the winter. There is not much to do during winters apart from drinking down the local pub.
Same story in Canada though you an go for skiing, etc.
Hopefully, Canadian winters will be more sunnier and people will embrace the winter and live thru it instead of trying to just escape the country!
Even if its sunnier, temperature is going to be -20C to -30C (some times with wind chill it will be around -30 to -40) You wont even fell sun.
I think Vancouver / BC doesn't have as cold winters as in other parts of Canada.
I do hear people using words like "harsh" and "brutal" to describe Canadian winters. Does it really get brutal in say for example Toronto? This of course make me feel a bit scared.
What ever I mentioned above is in Toronto. More North you go more worse.