I agree with Nick. If you don't need the money and they are not taking up too much space, then use both until you decide which one better suits your needs. I know nothing about the Calument. I had a Graphic View II and discovered that it is not easy to pack up and move around. Also, it doesn't like short focal length lenses. With my 90mm Super Angulon, the bellows was really cramped and didn't allow for much movement. I had to get a recesssed board and the Compur shutter on the Super Angulon barely fit, making it hard to adjust.
If your main interest is landscape, then I would sell both and get a field camera, probably with a 90mm lens, or something in that range.