I'm not even sure what you mean here... ICE cars have had electronic traction control for decades.
Teslas have an open diff and then electronic traction control. They "emulate" a limited slip by modulating the brakes.
ICE cars generally have either an open diff and electronic traction control (which works by modulating the brakes), or even better, a limited slip one plus electronic traction control.
Not that Teslas TC isn't very good for an open-diff car- it certainly is. But not in any way that'd change the results of the testing.
Err... the AWD Teslas also have increased mass.
They do have more power, but in snow/ice all the cars discussed, regardless of drive train, aren't being driven full throttle anyway- so not sure why you think more total power helps? Horsepower doesn't give your slipping tire traction.
Which ICE cars also have (they don't always come that way, but some certainly do)...so not sure your point here?
For example-
Global News Regions
Specs on a '16 GT-R... different final drive ratios front to rear. And hardly the only example.
Not in snow/ice if the AWD has all-seasons and the RWD has snow tires.
Results will be remarkably similar to the professional testing I linked to.
Same tires on both? Sure. But that wasn't the discussion.
Tires > drive train in snow/ice for most situations. (very steep hills being the main exception)