I can’t see how any of those machines would clean any differently from one to the other. If you had an edge,
razor, or Xr7 - say all with the same chemical and amount of chemical and hp passes and dwell, the result should be the same. The difference - as stated before- is the look, options, throughput, etc. of these machines.
I understand as a salesman you would want to be able to show a customer dirty in/clean out in a video, but I would think customers could see the machine doesn’t size the car any differently, and it’s still an inverted L with with the same pump and application method, so the basic clean in one would equal the other.