Is this a Probabilities Question?

[EasilyFound]

If one is devising a point system for a poker league, is there an objective way to comparatively value winning tournaments of different sizes?

Let's say you give 100 points for winning a 10 player tournament. Must winning a 20 player tournament have a value a certain value compared to 100?

For instance, I came across a formula that gave 101 points for winning a 9 player tournament and 150 points for winning a 20 player tournament.

Is there an objective measure to compare those two achievements? Is winning a 20 player tournmanet only 50% more difficult than winning a 10 player tournament?

Is this a probability question?

Good lord, I hope I've explained the question well enough.

Thanks for your time.