I'd wouldn't have that issue very high up on my list of spa selection criteria.
It's all just a slightly different way to filter the water. If your water is clean, then your filtering system is effective.
Some food for thought:
My Optima uses the small 24/7 circ. pump coupled with a 2 speed main pump, pulls water thru a different filter, and runs 4 times per day, up to 24/7.
So far I can say:
My circ. pump is almost silent. But the main pump on slow speed is very quiet too, just not quite so much as the circ. pump. But I use both for filtering, not just one.
I've already had one circ pump replaced under warranty, at about the 30 month mark.
Not sure if my small pump running 24/7 will wear out faster than a larger pump being switched on and off four times per day.
So far the large pump is winning that war. It's not needed service yet.