Well straight away the Nicolai has a much longer reach, nearly 10cm longer which is not insignificant.
Longer reach means more stretched out riding position which means potential for strain on lower back, as well as neck as you’ll be craning it more in order to be able to see straight ahead.
As a basic principle stack height will dictate the extent to which you are bending down to the bars and reach how much you’re stretching forward.
So a sit up and beg style Dutch bike will have very high stack and very short reach.
I’m surprised at the extent of reach difference between the Nicolai and the Stooge. I know Nicolai are loooong, but are they both the same frame size?
Regardless if I was you I’d be looking for a much shorter reach than the Nicolai and a bit more stack too..