Bad redesign - sanitary equipment from which manufacturer?

We have the Squaro edge 12 and the Venticello series from Villeroy & Boch, they match very well together. It is important to me to have the same manufacturer everywhere (I have a slight quirk about that). The drain fitting will most likely not fit. All the faucets are from Hansgrohe because they sponsor a cycling team (another quirk). Regarding the toilet bowl, as mentioned above, TOTO is the inventor of the Tornado flush and probably the best choice here, although we are very satisfied with the Villeroy & Boch.

Hello everyone,

thank you very much for the information. We have looked further and it will probably be roughly like this:

Bathtub: Villeroy & Boch Subway Duo + new drain fitting + feet (We also like the Squaro Edge, but it's a bit too expensive)
Toilet: Venticello (Because it is more streamlined than Subway)
Washbasin: Subway 60cm wide

Faucets Grohe or Hansgrohe (Still comparing)

To the toilet users of Villeroy & Boch

1. Is the toilet also compatible with flush tanks from other manufacturers? (Geberit)
2. Our water supply connection has a diameter of 40mm and the drain is DN 110, does the toilet fit onto this or do you need a sleeve or something similar?

Is the toilet also compatible with flush tanks from other manufacturers? (Geberit)

I would use the appropriate one for something like that.

The toilet bowl has nothing to do with the cistern, otherwise 90% of all houses would have a Geberit bowl installed.

1. Is the toilet also compatible with flush tanks from other manufacturers? (Geberit)

That doesn't matter at all. They are all the same in terms of dimensions. However, every manufacturer and every series has different actuator plates.

Okay, thank you very much, regarding the connection I have to check, I believe at Villeroy & Boch the connection is DN90 and ours is bigger.

I will then need some kind of adaptor or similar.