It's a dumbed down RouterOS (afaik they use the same base but I'm not certain) with a lot of features stripped out to focus on just basic switching features. It

It's a dumbed down RouterOS (afaik they use the same base but I'm not certain) with a lot of features stripped out to focus on just basic switching features. It also has a vastly simplified webui. As the other commenter noted you lose a lot of the remote management features and of course it hides lots of the stuff RouterOS can do, but that's the point. If you only need set it once and be done basic switching, SwOS is vastly simpler.