I, for instance, can say with confidence that I will guarantee chemical consumption for your Hot Tub to be less than $100 a year, or we will pay twice the difference, and we will stand behind that statement.
It's all salesmanship and it's all worth the same! :

If you have a family of 5 living in your hot tub, you will both use more than $100 in chems a year AND have more than $20 a month in electrical costs.
My HS dealer guaranteed less than $20 a month operation and *did* offer to hook the spa up to a meter for some period of time (1-3 months??) to prove it, and showed letters and readings from other customers who had taken him up on the offer.
HS is one of the best insulated tubs on the market. Heck, over last summer my electrical bill was only between $5 and $10 more than the previous summer (of course we keep the tub temp down in the summer to around 97).
So what? You might nott miss the extra $5, $10, or even $20 more a month you might pay for a different tub's consumption. You might buy a less efficient tub but use it less, or a more efficient tub and use it more. If you pay $130 per year in chems, you shouldn't worry too much about it.
My car requires 93 octane. I hate paying extra for it, but I don't hate it so much that I would rather have another kind of car.
The value of the HS claim is that they stand behind their product and excel in the areas where *they* feel the engineering is needed. It gives you some trust if the things important for your shopping are the things important to their engineering model.
That is why wet test is king and the one thing everyone can actually agree on. If you buy a HS tub to save $5-$10 a month on electrical costs and maybe $30 a water change on filters but don't like the tub layout that's foolish. Buy it because you like the motomassage, or the open seating, or the therapy zones, or... go buy something else!
If you really can't decide between two based on several (really, several) wet tests, then you start splitting hairs.
BUT don't start splitting hairs with replaceable micro-filter versus the washable tri-x filters, the cost per month to operate, etc.. etc.. that's getting into the minutae where the salesmen live, and it is minutae that evaporates within one week of whatever you buy.
Start with the dealer himself. All tubs will have problems. HS and Sundance owners alike have had problems on tubs they bought in the past year here. The dealer is who takes care of you.
People make mountains out of molehills and there are alot of dealers on this board selling or practicing pitches or learning about the competition. Just because there is a good and/or responsible dealer on this board for a brand doesn't mean that your local dealer will be a joy to work with.
Buy the tub that you want to sit in for 3 hours with friends.
-Ed