From your article, the tax contribution amount for Germany, Denmark and France are 53.6%, 67.8% and 35.5%. If we take those numbers to get the pre-tax price it becomes 13.7, 12.8 and 11.4 cents per KWh respectively.

So while France generates electricity a bit more cheaply than the other two the difference is not massive, and could be explained by economic disparity (GDP per capita is higher for both than France).