Difference between dim switch and dim button?

The application in this case is exclusively lighting (ceiling lights).

In the case of ceiling lights with screw sockets, there are bulbs with step dimmers 10/40/100%, we have them like that and it works well

Thank you for your explanation! In the meantime, I have come a little closer to the topic. The difference is indeed rotary dimmer or push-button dimmer. Are there reasons why one type is installed in one room and the other type in another room?

The difference is related to the lamps. Above the dining table hang LED filament lamps. These are LED lights built in a kind of retrofit style. In German: LED bulbs that pretend to be old incandescent bulbs. Here it is practical to be able to quickly and continuously adjust the brightness. In the bathroom, an LED light strip was installed along the stucco edge and in the niches at the tub and shower. Because the push-button dims or brightens the light quite slowly, each user (the woman prefers a softer light, I prefer it rather bright but not too bright) can "approach" their individual light intensity. We wanted it exactly that way and find it very nicely implemented.

if I may summarize my previous research and your esteemed answers:

a) lighting can be adjusted more precisely with rotary dimmers than with push-button dimmers
b) therefore, it is recommended to use rotary dimmers in rooms like the living room, dining room, bedroom (please correct me if this is wrong or add to the list of rooms)
c) in rooms where it is more about getting light quickly than fine-tuning, push-button dimmers are to be preferred
d) so push-button dimmers rather in the kitchen, hallway, children's room

Please correct me if I am mistaken or feel free to add or change the list of rooms (including the argument for it!)

Additionally, I would be interested to know which of the two types of switches is easier to use when your hands are not free.

Looking forward to your views!

Additionally, I would be interested to know which of the two types of switches are easier to operate when your hands are not free.

Switches equipped with voice control. Like Alexa lamps or Shelly dimmers or or or Without free hands, all switches are damn hard to operate.

if I may summarize my previous research and your esteemed answers: a) the lighting can be adjusted more precisely with rotary dimmers than with push-button dimmers [...] Additionally, I would be interested to know which of the two switch types is easier to use when your hands are not free.

I will summarize that your initial remark, that it was only about design and the electrical system, probably created a wrong impression. No, you are probably still at the very beginning. Whether you are well served by the concept "dimmer integrated compactly into each lighting circuit's respective control element" I doubt after the further course. I rather see you as a user of a PLC. If interested, I will gladly ask my "in-house Daniel Düsentrieb" if he has time to plan that for you. Rotary dimmers, as far as I know, are still usually analog rotary potentiometers, which can annoyingly buzz at twilight; I would prefer electronic dimmers. Mixing different modes of operation is bad for the Wife Acceptance Factor. Hands-free probably only works with the three angels for Charlie (Alexa / Siri / Cortana). If each resident individually has "fixed" preferences, it is also possible to control, with the help of RFID and without manual inputs, which dimming levels should be applied when.

I never claimed to already understand the electrical workings behind it – quite the opposite! Hence the questions and my attempt to get a feel for the topic. Answers dripping with sarcasm don’t help me, so save yourself the effort and me the time of reading them.

Is it only the rotary dimmers that buzz? Can that not happen with push-button dimmers? (Maybe I should also mention that I am not talking about a KNX control system or similar, if that matters?)

As already mentioned, I have read that due to finer dimming capability, rotary dimmers are more suitable in certain rooms than elsewhere. That, of course, also gave me something to think about. Do I then have a rotary dimmer alongside a push-button dimmer? That’s annoying, isn’t it!? -> Topic Wife Acceptance Factor.

I wasn’t trying to get into Alexa, RFID, thought transmission, or whatever else. The question arises (as so much does during planning) from practical considerations: “I walk down the hallway and do this or that...”. And in this case, my consideration is: “I come from room A to room B with a heavy shopping basket in my hand and want to switch on the light with my elbow. Better rotary dimmer or push-button dimmer?”

Thanks for your answers and thoughts!