Do you have much experience with the special rendering of certain Leica lenses?
....
https://www.artphotoacademy.com/the-leica-look/
That article is filled with reams of the photo equivalent of audiophile word-salad.
Statements like "A magnitude of micro-contrast is inversely proportionate to the number of optical elements in the lens." is like saying "audio detail increases exponentially with the onyx content of your amplifier support cones."
There's nothing about detail and contrast that can't be quantified with fantastic precision by an MTF curve (the optical equivalent of frequency response, but related to image spatial frequency). There is no relationship between number of elements and any modulation value. And Zeiss is not a company that shies away from using many elements if a design calls for it.
There's also the matter of Leica / Zeiss lenses using a wide variety of different lens designs, throughout history and at any given period. You'd find all different shapes of MTF curve, all different degrees of spherical aberration correction, all different kinds of flare qualities.
One thing that can be kind of consistent in distinguishing one brand over another is overall color cast. But this has always been infinitesimally subtle—more measurable than visible. These differences are dwarfed by differences in film stocks, sensors, and processing.
I did a fairly systematic blind lens comparison with a bunch of other large format photographers several years ago. We were doing something that should have been a lot easier than, say, distinguishing Leica from Nikon. We were comparing modern Rodenstock multicoated lenses with very simple, single-coated lenses by companies like Goerz and Kodak that were decades old. In many cases no one could tell the difference when all the other variables were held constant.
The differences between these lenses would have been obvious if measured on an optical bench, but in real-life images they were dwarfed issues like depth-of field, diffraction, blur from vibration and wind, etc.
We were not looking at bokeh, but all of us had enough experience to know that this is a lens-by-lens consideration, not something where any company is consistent across models and focal lengths (cinema lenses being an exception here ... that's one of the things you're paying for).