You're Dutch, so i tested it for you.
I just bought both cars.
This is my tip for applying tunes:
Always start from the bottom in your game.
match weight (ballast, position and reductions)
match power and limiter
PP and weight should match now, don't mind the BHP, i have PK (translated horse power) and not Break horse power, my value is always a little bit more.
Match the drivetrain (diff, clutch,shaft, centerdiff)
Now match the gearbox.
i did both cars, and have a little difference in the last gear (not final gear)
Mostly the last gear is maxed in tunings, but my values are a bit higher possible than the max in the
@shaunm80 's tunes,
screens:
MINI '98 6th gear, i can match, but my max value is 1.195 ( i do use the 1.191 value)
View attachment 388656
Mini '11 6th gear i can match, but is max 0.001 more pssible in my game.
View attachment 388657
Good luck, you should/could match the settings 100%