There are two known models of ships that the Sagitarrian Spaceways has built from the Intersun Passenger Cruiser standard model.
SSPL-379A
It is visually apparent that both of these models have different color schemes. By the model name, it would be assumed that this ship would have a lower passenger capacity than its SSPL-481A counterpart.
SSPL-481A
This ship has, only by its name, may be assumed that it would have a higher passenger capacity than the 379A model, or would have been a later model that has been improved from the original one but having the same seating capacity.