10+ Difference Between Audi S4 And S6 If yours support dvds format.it will surely play dvds. 2018 audi s3, s4, s5, s6, and s7 sedan comparison. Front Left LH Power Window Regulator for Audi S4 S6 A6 100 ... from i.ebayimg.com Difference between audi a4 and s4. From what i understand the engine is the same, and you can get the a6 with quattro, so will a6s are heavier than the s4, but you get a wider body.