Welcome to our forum.
If you look at the results, there is an * by the HS tubs results, because it was preset on a cycle were it only ran when it needed to heat. Other ff tubs in the test were set on full filter cycle modes. This is a big reason why the HS tub out performed other FF tubs that are insulated the same way.
If I sold a FF tub and saw the results, I would wonder how a tub insulated the same, ran on a circ pump, with one of the thinnest covers in the industry out performed what I sell.
Are other circ pumps using that much more electric.
Yet know one has mentioned that. Even the company that did the tests said that the HS should have walked away with the test.