A correction factor was applied which isn't correct as the engine will 'correct' itself back to the same level or power.
Next thing, the M5 is fast in the quarter because it has 4wd and matches the Ford GT to 60mph because of that. If you look at their numbers for higher speeds you will see the GT is much faster. Some of that will be due to drag and frontal area but from 60-100mph there is a 0.6 second speed difference which is quite a bit.
I think this is much more realistic:
https://f90.bimmerpost.com/forums/sh....php?t=1504687
For the old 600ps/700nm tune in my car and the 30 Jahre M5, check out post 25 here.
https://f80.bimmerpost.com/forums/sh...1036947&page=2
Unfortunately they haven't done an F90 Competition review yet.