Gt63s 4 door is coupe design but it's a sedan. The definition of sedan is to have 4 doors 4 seats and thats Amg gt63s is. M5 wins its category just because it's 2 years newer than E63s. Think about gt63s as E63s comes out 1 year newer than m5 and it beats M5 competition in every single way.
The problem with the new F90 M5 and M5 Competition is that journalists don't seem to be able to drive them lol. As Car and Driver drove the regular M5 to 2.8 0-60 - these 3.6 to 100 km/hr are ridiculous for the Competition. This is because these journalists don't enable launch control correctly and end up just do a brake stand - hurting their time. As I have run a 10.93 at 129.54 MPH - this car is easily sub 3 seconds to 100 km/hr - it's AWD being its advantage.
[2019 BMW M5 Competition] Autopista 6/2018 results: 0-60 km/h = 1.8 s 0-80 km/h = 2.7 s 0-100 km/h = 3.6 s 0-120 km/h = 4.4 s 0-160 km/h = 6.9 s 0-200 km/h = 9.8 s (400m: 11.1/213) 0-250 km/h = 17.9 s (1000m: 20.0/267) 0-300 km/h = 29.2 s (1600m: 28.0/292)