I cannot say for sure. My personal income is the same I would get in Toronto, but it's anecdotal. I know they are slightly lower on average, but when you factor in the cost of living (rent is 2x higher in TO) it is probably very similar. On the other side, I would say the quality of life is much better in MTL, as the public transportation is better, people do not live as far and are closer to the various activities, etc.

Rent in Montreal is much lower than Toronto, especially for units over 700 sqft. Toronto apartments can be affordable if you're OK with a 400-500sqft shoebox, but prices rapidly go up from there.