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I will try to be as unbiased as possible and explain some differences.1.) Marquis has a high flow system, a circulation pump is a low flow system. Â Marquis used to use a circ. pump, but found it more effective to use the jet pumps to filter the water. Â When you use jet pumps you are able to churn up a lot of water and actually get movement on the surface. Â The surface is the dirtiest part of the water, so doesn't it make sense to skim the whole surface area? Â On the Jacuzzi if you watch the circulation pump it is basically trickling water out of the spa... you will not see much surface movement at all. Â That means if there is hair or debris floating on the surface, it is unlikely to be filtered out. Â Marquis is able to filter more gallons of water in just 4 hours of the day, than the Jacuzzi can in 24. Â The circulation pump was also Marquis' number one warranteed item when it was put in our spa. Â Think of your car, could it run 24 hours a day, 7 days a week, 365 days a year and not fail? Â 2.) Marquis solid state ozonator requires no maintenance and has an average life of 5-7 years. Â Corona discharge ozonators typically have to have yearly maintenance. Â 3.) The HK40 has no 90 degree turn in the back of it, allowing it to put out 40 gallons per minute. Â Even the large HK16 jets in the Epic don't come close as far as water output. Â The looks of a jet face can be decieving. Â Be sure not to mistake pressure as being stronger. Â Marquis believes in high flow, low pressure, allowing for deep tissue massage.4.) You will have to be the judge as to which manufacturer is superior. Â Jacuzzi is a respectable brand. Â I will point out one HUGE thing- warranty. Â Marquis has the only transferrable warranty in the industry. Â You will also not find exclusions such as water chemistry in the Marquis owner's protection plan.Good luck, it's obvious I sell Marquis, but like most other Marquis salespeople, I passionately believe in the product.
 Marquis is able to filter more gallons of water in just 4 hours of the day, than the Jacuzzi can in 24. Â
This also means that your ozone system is only working 4 hours out of 24. In my unbiased opinion.
Here is a Jacuzzi dealer reccomending 2 year and 3 year maintenance on CD ozonators:http://cdabilliards.com/spas/spa-maintenance/Sorry, their website is giving a biased opinion