Hey Benjamin,
thanks again!
Very interesting indeed.
I think that the polycount is quite close to your simplified examples.
It does however mean that there must be more differences between High, normal and preview than just the resolution.
And if you look closely, there are unintentional spikes on flat surfaces, which influences the appearance quite a bit.
In the end it is a matter of scale - do you want a closeup model with all intricate details or is it a prop in a larger setting.
And if you squeeze that last one into 50.000 and compare it to another 50.000 based on a high detail reconstruction, I bet you have to use software to visualize the small differences…