I've had a Chromega B but know nothing of the Superchromega. Look at the column height, bellows draw, and largest format it'll do. My Chromega had an XL column that made doing large prints much easier so which one goes taller?
The bellows draw will limit in one way or another your selection of lenses. A bulky bellows will restrict a short focal length at maximum height and a short bellows will restrict a longer lens from doing very small prints so check that against your wants and needs. My Chromega was a 6x6, I've found the Super is 6x7 which may make it a better choice as it give you more options for formats.
Hope this helps.