Mix red and white stones?

I was not aware that I could post complete projects here.

This is actually the specialty, I did it myself here a few years ago, almost like construction supervision. At that time, there were numerous construction projects here, continuously documented and elaborately illustrated, from standard single-family houses to very special houses. I miss that and unfortunately only experience bits and pieces or sudden breaks in communication here.
There is THE questionnaire here that you should fill out and explain as much as possible with floor plans, elevations, site plans, etc.
In my opinion, you can only gain from this when you receive insights and opinions from people who have already been through exactly this one or several times and who have no economic or other connection to you.

I find this very contradictory:

What is contradictory about that. They are two sentences taken from different contexts.

You can't say anything against red and white on fries, but when the hot dog sauce, because it provides the sweet/sour taste, the mustard as well as the remoulade, which is known to belong on the fish burger, are added on top, then one was probably overwhelmed by the extra sauces on the snack menu.

If all that is nonsense, what would you choose as a sensible combination? Exterior wall: Poroton Load-bearing interior wall? Non-load-bearing interior wall?

If all that is nonsense, what would you choose as a reasonable combination?

Outer wall: Poroton Inner load-bearing wall? Inner non-load-bearing wall?

If we were in wish-I-could-have mode, then preferably KS inside, also for the non-load-bearing walls. Steel stud construction can also be applied on top, but only with Q4 jointing. I’m still looking for an advantage in gypsum boards.

But we are not in wish-I-could-have mode, because everything costs. On the ground floor we have all interior walls made of red Wienerberger, and I am very satisfied.

Nevertheless, I have other priorities in house construction; whether the stone is red or white—the desired energy efficiency should be achieved with it, sound insulation is not a priority as much passes through the windows, and the walls should be able to hold art and furniture. Whether red or white dust comes out when drilling, or whether I have to use this or that plug, I don’t care.

And so I don’t choose a general contractor based on the stone but focus differently and am pleased when the GC selects the best material according to their or preferably the architect’s knowledge, which I am willing to pay for, and then I trust them. Because the design, the static calculations, and the region also influence the product. Professionally, I do something completely different than knowing how to build a house.

With us, all interior walls - load-bearing or not - have become red Wienerberger. Exterior walls naturally also thicker. See no reason to mix and I would only use gypsum walls where I already know that I want to tear something down later... GD

What is so incomprehensible about the question? Mixing red and white bricks? Or better not?

Counter question: what is unclear about my follow-up question? – or what is so difficult about using the forum search with the keyword "11ant Steinemantra" here (or finding it via my signature > imprint of the Insta account "Bauen jetzt" and reading it there)?
Normally, do not mix anything and especially do not mix any magic or test-winning brick from Bäckerblume or Apothekenumschau. Or mix exactly as an independent consultant (e.g. architect – but only including service phase 5) suggests.

What would you choose as a sensible combination?

I have repeated this as often as a record with a scratch:
if I am involved in a planning)
my advisees are told separately for each wall what is best to choose;
if clients go to a general contractor with a building permit planning)
the wall construction with which he has the most or second most (i.e. used in 40% or more of his projects) experience in processing.

Exterior wall: Poroton
Load-bearing interior wall?
Non-load-bearing interior wall?

Exterior wall if porous brick, then the filled variant; load-bearing or bracing interior wall with the aforementioned exception exactly like the exterior wall; non-load-bearing interior wall with the aforementioned exception on the ground floor also exactly like the exterior wall and on the upper floor due to statics or in the attic due to connections in drywall construction (metal profile with plasterboard).
No experiments, as a client (layman) don’t try to be clever with the contractor (professional) about how things should go.
This regularly leads to the system of wall former, mortar, plaster, and processing experience being disturbed.

I would only use gypsum walls where I already know that I want to tear something down someday...

The topic was gypsum wall panels (boards or large format blocks) – not gypsum plasterboard-clad lightweight (partition) walls.

When can we finally expect the project thread starting with the completed questionnaire and the presentations of the plot as well as the design? (Are you building a house or a popcorn thread?)

if you want or need better soundproofing, then for all walls including windows. Why only for the load-bearing walls?