I am not sure, generally the pumps are pretty good, mine lasted 9 years, my truck camper one lasted 33 years. now I will say I was surprised to see there was no inlet strainer on the 5th wheel pump, there is now.
I Imagin ultra high end either has them in sound proof enclosures, or uses more of a commercial setup. the problem is diaphragm pumps are good, you can run them dry, they handle crud in the water no issue if you don't have a strainer (unless it is to big) and generally they are very simple to repair. but there would be differences, a ultra high end coach would have a accumulator of some kind and probably higher flow. now mine was very quiet, just because of where it was in the 5th, but when it ran dry or got a bit of air you could hear it. in the camper, well its under the kitchen sink basically so you can always hear it but it isn't that bad in the camper for some reason.
if I had more time and would have waited for one off amazon or something, I probably would have bought THIS