so, if i'm to use this white one the way it was intended, i have to also buy this unifi controller?Yup, hardware should be identical. The CLI should also be identical. The white switches are managed through a unifi controller and generally give you fewer options (unless you use the CLI) but you can integrate them with other unifi equipment. The black switches have the edgeos interface which is standalone but gives you more direct control from the web interface.
you said CLI should be identical, does that mean it is possible to use this white one via CLI as standalone? (basically, like the "Edge" version)