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I wouldnt worry about low rolling resistance - going through snow itself will kill any advantage of rolling resistance you have on pavement.
I've been stuck so bad just using non-snow tires in snow, that i'd think the 4wd wouldn't help at all - non grippy tires are non-grippy. Worse than not gripping for acceleration, they don't grip for BRAKING. Or for swerving in low traction. No way i'd risk safety for a few percent fuel efficiency. Aeromods and P&G yes, but i've never cared to plan for LRR tires except when the roads will be 95% snow free.
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