Apologies if this has been addressed. We are talking about planetary surface installations, not orbital stations correct?
Any idea if they will be the city style or the Odyssey settlement style or something entirely new?
Not sure who you are replying to, and it's not that easy to just read every comment back so just assuming you're asking about the Colonization feature in general:
You will be able to build both orbital stations and planetary stuff.
Frontier have pretty much confirmed they will be like all the already existing assets in the game. As far as surface installations go, there are 3 types already in the game: Horizons Settlements (Undockable, just mission targets with a datalink really), Horizon Planetary Ports (They look like small cities, have been in the game for a while, usually large pad dockables) and Odyssey Settlements.
As for anything "New", the only confirmed thing I guess would be that there's going to be an "in construction" state to them where the planetary port/installation will have unfinished assets and just a ton of shipping containers on the ground.
There might be multiple stages of completion but that's it.
No you won't be able to build
cities. They haven't confirmed you won't, but they also haven't confirmed you won't be able to ride a dinosaur like a horse either. I wouldn't get hyped out of something I made up in my head when they haven't confirmed nor hinted at that