W or S mode?
I don't think one is better than the other as far as transmission life and wear is concerned.
Just kidding.
I agree with O-Dawg - it is purely "driving / performance / response" and (weather conditions) preference.
I use both, depending on my mood and my passengers'.
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If you didn't notice....
Your gear will shift up at a higher REP on Winter mode then S mode. This is because to prevent over spining of the wheels. This kinda prevents the full power support to the wheels from the engine. (more rep more gas)
On S mode the Gear will shift right on...
If you want to.....try to accel your car up to 50mph from stop on both modes...U can feel that your car picks up speed faster on S mode.
I just put on S mode most of the time unless it rains or snows...
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