If you’ve already checked out this ACS4 Sport BMW M4 over at AC Schnitzer’s Geneva stand and thought it was identical to one they brought to last years’ Essen Motor Show, you’d be surprisingly wrong.

Yes, there are many (many) similarities between the two. Such as it being the same type of car, same color, same size wheels (21″), same mirrors, same engine mods, same markings and so on.

What’s harder to spot are the subtle differences, brought on by the fact that the Essen model had on AC Schnitzer’s “generic” aerodynamics pack, whereas the Geneva model was fitted with the Racing Aero pack which includes racing suspension, a new front splitter, carbon fiber front side wings mounted on the front skirt, a slightly taller carbon rear wing, and ‘Racing Evo Carbon’ exhaust.

AC Schnitzer’s performance upgrade has bumped up the power of the M4 from 431 HP to 510 HP – as the engine compartment itself looks pretty darn flashy. But there’s no difference in power between the Essen car and the Geneva car.

So there you have it then. Two slightly different Aero packs, one a bit more subtle than the other. So which one do you prefer?

If it was up to us, we’d rather take the Racing pack, you know, since we’re suckers for large rear wings.

PHOTOS