I know this topic is beaten to death but I wanted to know if it would genuinely make a difference for my needs. I am looking at an S4 that I will be commuting with about 100 miles a day most of which will be interstate miles so will not having the sports diff really affect things like passing power? Also will it make a difference in the snow for instance would having the sports diff be the deciding factor for not getting stuck in snow? Please let me know your thoughts and/or experiences.