Tony said:There are three Galaxy models, and IIRC, the Galaxy and Super have the same frame, with a horizontal top tube, while the Ultra has a sloping top tube, in the older ranges. http://www.ctcshop.com/dept.jsp?dept_id=3401 is a link to the modern range, where it is the other way round, with Super and Ultra sharing the newer frame.
Exactly.vernon said:Look at the drive train, gear changers, saddle and wheels for the difference in spec.
As one moves up through the range the spec improves.