Edmonton definitely is colder than Toronto, temperature wise (you're more likely to get -20 to -30 temps in Edmonton more often than Toronto, but it's humid in Toronto, so, sometimes -10 in Toronto feels like -20. ) Yes, it does snow more, most of the time although last winter it hardly snowed. Yeah, in the winter, it sucks. But, even when it's really cold, the sun is still shining, so that's a positive. Toronto isn't hotter in the summer, it's just more humid. Edm summer temps are mid 20s to sometimes mid 30s. Hot spell for a couple weeks in July this year where it was in the 30s all the time.
The #1 reason people would move to Edmonton is JOBS. There are people from all over the country migrating to Alberta right now, esp from out east. There are jobs in almost every field. Go to edmontonjobshop.ca for a sample of what's out there. If you want to make lots of money fast, there's lots of jobs in the oil industry - but that means you will have to work in northern Alberta/BC for periods of maybe 3 weeks at a time and not see your family (unless they want to move up there with you). You can do a low level manual labour job in the oil fields making 60,000 a year for a start. But you will have to work outside even if it's -30. If you have a trade, even better, you will get hired immediately and get paid a LOT.
Rent is cheaper than Toronto, and you will pay less taxes as there is only a 5% GST tax in Alberta, no PST.
People aren't necessarily friendlier, but people have a slower pace of life and are a bit more down to earth than they are in Toronto or Calgary (in general). The bus system isn't the greatest so you will need a car to drive around (unless you live downtown or near a bus or subway station and your workplace is also along a bus route).
Lots to consider, you can make friends anywhere and your home is what you make of it. Ultimately, if you are looking for a job, it's the place to be.