It's a bit more crunchy and it has a very specific taste I can't describe, more sour and sweet at the same time. You can't buy it in shops, only in farmers markets or make it yourself.

Here is a basic recipe: https://grocceni.com/recipes/leavenedgherkin.html

This is a bit more complex, it adds sugar as well: https://dailynewshungary.com/recipe-for-the-perfect-leavened-cucumber/

Here is a video recipe: https://www.youtube.com/watch?v=oMfgDg2BGXs