The others have wide wheelbases and roll easily, but their large size and exposed wheel wells threatened to catch on my millwork. Fein hides the wheels and installs a rubber bumper at the bottom of the canister that protects things like freshly hung cabinet doors and expensive millwork. Dry pick-up attachments. I put a lot of effort into building cabinets and making countertops, so the last thing I want to see is a blunt plastic nozzle scratching the work. Fein provides an excellent vac head.
Brushes raise the potentially marring plastic off the work and keep it safe.
As I reached to get more dust or moved to a new spot, I towed the units by their hoses. Tightly locked hoses didn't pop out while I worked with the tools or moved them. The Craftsman, Fein, Ridgid, and Shop-Vac hoses lock securely to the vac bodies. This makes them versatile enough to suck up bulk items or to attach to power tools. I suppose you could go to the supply house and load up on reducers, expanders, and new hoses, but with these two tools you're ready for action right out of the box.