Questions about Eagle Creek Cargo Hauler XT Wheeled Duffel 120/32

Can this bag be made small or is it more like a suitcase? We want to buy one or two larger travelling bags with wheels. The aim is to be able to stow them well in a motorhome, but to make travelling and keeping things tidy comfortable. In terms of size, the volume should be around 120 litres or larger. What I don't see in the various suppliers (Cargo Hauser) is how small you can make these bags. Is it correct to interpret that the Cargo Hauler Wheeled Duffel 130L can be made relatively small and the Cargo Hauler Wheeled Duffel XT 120L is then more like a "suitcase"?