Mercedes-Benz C 63 AMG S Coupe (C205) specs

Mercedes-AMG also made the Aero Edition version of the C63S but it's only for the Australian market. That is the BMW M4 CS (and possibly CSL or GTS)'s rival to the regular C63S's M4 Competition. Even if the C63 Aero Edition didn't come with the "S" performance package, it would pose a middle ground between M4 Competition and M4 CS, or better yet compete with an M4 Competition with M Performance Parts.

Strangely, both the C63 and C63S rivaled the M4C. The regular M4 was more of a middle ground between C43 and C63.

The reason why AMG didn't make a competitor to the M4 CS and GTS is because of Aston Martin. As a matter of fact, the C63 S shares its chassis with the DB11 V8, DB11 V12, and DBS triplets.

If we want to get technical, Aston Martin rivals the Audi-based Bentley and the BMW-based Rolls-Royce. But the DB-series Astons are noticeably both smaller and sportier than the Continental GT and the Wraith/Dawn twins, not only because Aston Martin decided to utilize a C-Class platform, but because DB-series Astons have been nimble for the longest time, as dynamically they have been closer to Ferrari and Porsche's GT models.

The 2018 facelift has 24 PS and 4 Nm more than the prefacelift, which had exactly 510 PS and 700 Nm.

Compensating: The car.

0-60 mph: 3.8 s
0-100 mph: 8.5 s
0-150 mph: 20.4 s
1/4 mile: 12.0 s
http://www.roadandtrack.com/new-cars/g6864/road-and-track-performance-car-of-the-year-2017-test-results/?slide=8

Top speed: 297 km/h
https://www.flickr.com/photos/dedethecollector/36263656194/