Hello Odusseus,
The points you receive or lose always depend on your opponent's rating. 
If you win against someone with a higher score than you, you’ll get more points than if you win a lower-rated player.
Likewise, if you lose to someone with fewer points, you’ll lose more points than you would against a stronger opponent.

For all the details, feel free to check out the FlyOrDie's rating table

https://www.flyordie.com/games/help/rating_system.html

Kind regards,
John