This is a question that will produce multiple opinions, like a dog chasing its tail. All hot tubs are designed to "deliver" performance at the jet, and that is what the salesperson will tell you, so it would be hard to differentiate the differences.
On the other hand, those that make the hot tubs take this subject seriously. Do a search for Artesian Spas Premium Elite Series, or even some of their Island Series. Each seat in the Elite Series has a dedicated pump in a very close proximity to the jets at each particular seat. The intent is to deliver maximum performance directly to the jets without dissipating the power which in other tubs may be reduced while traveling 5' to 6' from the pumps in the EQ area before getting to the jet system. It does make a difference.
Additionally, each seat has its own variable control allowing the motor to deliver either minimum, or maximum, power from zero to full throttle while sitting in that particular seat. I would consider it to be energy efficient in doing so, because if one person is in the hot tub, only one pump/seat is on for the user. If there are 3 persons, each user has control for their particular seat. This way you pay for the power being used, while all other jets remain off. Consider 90% to 95% of the time 1 to 2 users are using the hot tub at any given time.
You pose an interesting question that only a pressure gauge will answer. Find yourself a pressure gauge, put a length of vinyl hose on it using a funnel to cover a jet, and take it with you on your shopping trips. It will be the best way to answer your question.
