Incorrect similarity score calculation for text string comparison

[jsondervorst1]

I'm comparing two text strings via a fuzzy join function to get the similarity score.

However, I'm getting incorrect results for the similarity score.

If I'm not mistaken in my search for solution Fuzzy Match calculation explained , it should be based on the jaccard similarity score. However the results are not corresponding:

Example 'INDEMANS CHR SRL' vs 'INDEMANS CHRISTIAN'

Power Query: result 0,37

Online tool: result 0,55

Link 

How is this possible?

Thank you in advance.

Update: I've added a step removing spaces in both columns, making the result for these specific strings better (0,89). I'm then returning the maximum score of the two comparisons. However, I suppose normally the 'IgnoreSpace' should have covered this, which clearly is not the case)