I live in Toronto too and my car is in the garage for the winter. Mind you, I didn't want to drive it as a DD in the winter and I also have a beater.
If I were you, go on what the test drive impulse tells you. Yes, the RS4 has AWD and is a bit rarer but there are some others on this forum who also live here in the T-DOT who are running their cars on winter tires. I know even SlammedM3 is driving his car with winters and his car is really low and he says he has no issues.
Realistically, there are about 10 days a year I wish I had AWD, the other 355 days I'm happy I'm driving a RWD.
Go on what you think is better looking to your eyes and what makes you feel better after your test drive. Don't let the snow of our city be the deciding factor.
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