Soil pipe / saniflo

[Pendingcompletion]

Probably a crazy ask from one image but here goes...
The house we're buying needs quite abit of work, there are two current toilets and I was hoping to move one.
I think that one of the current toilets is a saniflo type thing.
Does anyone know what the attached image might be relevant for? Is it likely to be some kind of soil pipe? If so, is there a clue as to if a regular toilet or saniflo type?
I'm going to view again next week and trying to get a bit of a handle on the plumbing situation before deciding on what kind of expert to get in.

Bump !

The brown pipe that is going into the black one, are soil, therefore it looks likely that the two white ones are possibly a wash hand basin and toilet.

@takeaflight thank you. Does the size of the white pipe indicate a saniflo type system or am I over imaging stuff?

Hard to say without knowing what is on/above the other side of the lh wall. Is that another soil pipe running along the top below the floor?

@Somersetbaker no idea, but thank you. I had this idea that if I knew what to look for then I'd take appropriate images next week, ask online and then know if I should get a drainage or building or some other type of specialist in.
None of this is a deal breaker in terms of the house, I love the house, it's more wanting to budget appropriately.
Aahh I hate not knowing what or who to do/ask.