I own both. I don't see why the S4 wouldn't be compared to the M3.
1.) My tuned S4 is considerably faster than my tuned M3 in a straight line.
2.) I absolutely hate the DSG transmission. I should have done 6MT in both cars.
2014 White 911 C2S | Leather Interior in Black | Sport Seats Plus | 7MT | X-51 Powerkit | PASM-Sport | Sport Chrono | PSE | Carrera S Wheels in Platinum | Bi-Xenon in Black w/ PDLS | Sport Design Front Fascia, Steering Wheel, & Mirrors | Burmester | RSS Spacers
2012 B8 Monsoon Grey Metallic Prestige Audi S4 | Titanium Package | AWE Exhaust w/ Resonated Downpipes | AWE S-Flo Intake | GIAC Performance Software