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I'm going to measure each tub at different settings and full out.
The noise level will also depend on what foundation the tub sits on. A wood foundation tends to resonate, where as a cement floor does not. There is a big difference.Also new pumps are usually quiet. Go back and test the same tub after a year of use.Regards, Zz
The main issue is not how loud the tub is to your neighbors our to someone outside the tub.
I wonder if your neighbors agree?
Who cares what those blue hairs to my left think... Besides the loudest tub on the market wouldnt come anywhere close to being as loud as his weedwhacker at 7am on a weekend morning.