ᐅ Exterior Wall Bricks: Should You Choose Hollow, Solid, or Facing Bricks?

Hello everyone,

I have gone through countless discussions about bricks by now. However, some questions remain regarding the construction of our single-family house.
In the meantime, we have decided on bricks without external thermal insulation composite systems (ETICS).

What remains unclear is whether to use filled (perlite), unfilled, or possibly even a (more stable) engineering brick from the ranges offered by well-known manufacturers.
It is important to us that the brick is not too crumbly and that kitchen cabinets, etc., can be securely fastened with reasonable effort. Sound insulation is also a factor.

How do you see the following points:

• Which type of brick is more "stable," or which holds fixings better?
• Are bricks with lambda values of 0.09 to 0.12 in practice significantly more stable than those with 0.07–0.08?
• Are unfilled bricks more crumbly than filled bricks?
• Is the extra cost for engineering bricks designed for multi-family buildings worth it for sound insulation and stability reasons?
• Do sound insulation ratings of bricks above 45 dB make sense at all if no soundproof windows are installed (since the "weakest link" for sound would then be the windows)?
• How do filled bricks compare to unfilled bricks in terms of price, i.e., which is more expensive? (As a layperson, I found the price lists from well-known manufacturers quite contradictory)

Thanks for your input
ufr123