Zaanse is the best Dutch mayo because it doesn’t have that much sugar in it, Calvé for instance has more than double the amount of grams per 100ml.
I see Hellmann’s is about the same sugar wise as Zaanse.
As a Belgian I grew up with less sweet mayo, like max half a gram of sugar per 100 grams of mayo. So often mayo from other countries taste too sweet.
Egg contains sugar, very little hence saying added sugar is noticeable in taste.