I'd agree with David I've had better luck in a front wheel drive car with winter tyres than other 4 wheel drive cars on summer, and have used summer tyres in summer and winter tyres in winter since, even when I got an AWD car. I don't think our AWD system will make any difference in stopping, only the rubber on the road will do that in winter when the temperature drops below about 7 degrees ish.
To back this up I nearly put my new STi in a wall last winter a day after I changed back to summer tyres because I thought we'd seen the last of the winter weather. Wasn't driving fast just lost traction on all 4 wheels going up a hill and skid sideways into the kerb and then started sliding down the road. A few cars got past me including a van, but most if not all had either winter tyres or were big 4 wheel drives with off road tyres.
Just my two pennies worth.
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