What's the difference between a steam mop and a steam scrubber?

Standard steam mops like the Shark S1000 or Bissell PowerFresh use a stationary pad and rely on heat plus your motion. Steam scrubbers like the Shark Steam & Scrub or Bissell SpinWave SmartSteam add rotating pads that mechanically agitate the floor. Reviewers in r/housekeeping note scrubbers handle stuck-on grime better but are heavier and pricier.