Goran
Is it possible for a manager (Level 15) to beat manager (Level 20)?
No it is not.
A lvl 15 should not be able to beat a lvl 20 as long as the lvl 20 knows what he's doing.
BUT! There are many factors at play. Like the number of pitstops, the weather, car development etc.
I checked ur last race where u were one a 1 stop and the guy u cry about was on 2 stops.
As long as u do the exact same thing as the lvl 15 he shouldnt be able to beat u.
But since u were on different pitstopstrategies... there is 1 variable which can give a lvl 15 a great advantage.
An other variable may be where and when u use ur kers.
If u spend it all at once.. where he spreads it out to reach drs throughout the race...
Variables.
I saw your 2nd stint was on mediums, which would make u alot slower than his softs tyres.
So in the end.
Off course a lvl 15 can beat a lvl 20.
If the lvl 15 knows what hes doing and the lvl 20 doesnt have a clue it is very easy for him to beat u.