It depends on what you want or do with the car esp during winter. Do you go to the mountains for snowboarding or skiing?
You cant really compare RWD with Winter tires and AWD with winter tires. If you have AWD and Winter tires your car is a tank! I also go snowboarding.
Most of us here want power as much as we can get thats why you see some ppl getting a chip, exhaust, intake, etc even though some of them never use it or go to the track. Some ppl are a bit more practical so they get the 328 cause they figure they do not need the extra power.
I want both power and AWD thats why I got the 335xi
plus I used to go Auto-X with my previous car and I am planning to do it again and some tracking next year.
Also why in your profile it says you have a 07 E92 335i?