[Velusion]

I know the auto map generator doesn't produce normal mountain provinces unless you uncheck "impassable mountains".

My question is - would there be a noticeable benefit by manually marking a small percentage (say 1/4) of all Border Mountain provinces to normal Mountains after the "impassable moutains" map is generated? I understand that there are a number of fortress types that are not available because of this?

Also I assume that besides the movement and fortress construction Border Mountain provinces are the same as normal provinces?