The game doesnt really make a distinction between these types of terran worlds. They are the same terran world wise. Just one have a lower class. The only difference here I can see is the picture. Is the picture based off the real map of Mars. Just if it had water in its chasms, and clouds.

Just uploaded the image. The available tiles for terraformation are on the whole map means you can choose any tile you like.
This happens because water is sparse and there is plenty of land.
It starts as a class 9 planet.