Own cost difference

How much more do I pay in the case of a serious health event with a 2500.- deductible versus a 300.- deductible?

Here is the calculation

The maximum cost for you with the two different deductibles (300 and 2500) is given by the maximum cost for you with the 2500 deductible (3200 francs) minus what we would still have to pay with the 300 deductible (1000 francs). But...
From the result we must also subtract the annual premium saved

Calculation:
3200.-
Deductible 2500+10% (max. 700.-)
1000.-
Deductible 300+10% (max. 700.-)
1433.-
Annual savings between premiums

3200-1000-1433 = 767.-