There's climate and province size at least, DD #17 has a screenshot with a province screen of Bergen (mild winter, mountains, province size *4). There does seem to be a "thermometer" display of life rating as in Vicky as well. Life rating should be a separate value but probably affected by climate, in my opinion.
I think life rating should affect how many immigrants a province gets, but also people should prefer to emigrate to provinces with similar climates (&terrain?) to their home provinces. This would lead to Nordic peoples (more probably) moving to the Michigan, Minneapolis, Canada, Dutch and English moving to the plains in S Africa, and similar historical outcomes. Which were logical as well. If you're a Spanish farmer, you'd rather move to California or Florida, with warm climates as well, than to snowy Canada. Finns, Swedes, etc. would be less intimidated by the winters of Canada and the Northern US, but might not feel at home in tropical swamplands like Florida and Louisiana.