All these "drag races" are worthless at current temperatures because it is too cold.
We did some comparison testing yesterday, to compare my new Performance Box Touch with Dragy and it all went really wrong when we realized that an asphalt temperature of around 10-12°C isn't too good for our tires.
Only my GLC63S performed OK in this environment (see photo), there was barely slip (yes, even here there was) but my Performante did 0-100 kph in 3.4 seconds with launch control, last Performance Box (old) and Dragy results in summer were 2.8 sec in average (best was 2.7). Rear tires barely caught traction, 720S wasn't much better, he did 0-100 kph in same 3.4 seconds.
Also found out that the new Performance Box Touch is not suitable for the GLC63S without external satellite antenna. The device didn't have a proper satellite reception to finish a run, so I guess my GLC has one of those athermic windshields, blocking the satellite signal. Thank god the car has an built-in AMG drag timer.
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RC (Germany) - Rennteam Editor Lamborghini Huracan Performante (2019), Mercedes GLC63 S AMG (2020), Mercedes C63 S AMG Cab (2019), Range Rover Evoque Si4 Black Edition (2019)