skyrim doesn't have giant mushroom trees.
Also the archetecture from what i've noticed looks much more fantasy, and more sci-fi in some regards. definitely a change of pace regardless.
The giant mushroom trees arent native to solthsiem and they can grow ANYWHERE.
In morrowind when you go to solthsiem there are NO giant mushroom trees on the entire island. The only reason they are on there now is cus the telvanni that settled there in the last 200 years have grown the giant mushroom trees as their towers/ houses.
If the telvanni wanted they can grow the gaint mushroom trees in skyrim no problem. In morrowind you manage to make a tower in the middle of the desolate ash plains, you can grow them anywhere.
He was right in saying that Solthsiem is indeed pretty much exactly the same as skyrim in terms of landscape. Though you will be seeing BUILDINGS unlike anything seen in skyrim.
What about this settlement?
Also a beach?
http://i.imgur.com/TGLpk.jpg
Looks like new and improved fort frostmoth to me. BUT it could also be a new settlement.
Regardless, its still in a winter climate, if you look at the picture closely you can notice a snowy tree in the background. If it is a beach settlement (its a frozen beach settlement) my guess is that its either frostmoth or raven rock or a new settlement.
Either way its nice seeing the Redoran style houses (made from crab if i recall correctly)