A variable speed pump can run filtration at a lower setting, then use a different speed for a cleaner, heater, spa or water feature. That control can reduce energy use when the old pump ran at full speed for every task, and it usually reduces noise at lower speeds.
The result depends on the pump being replaced, its daily run time, electricity rates, plumbing resistance and how the new schedule is programmed. We do not publish a universal savings percentage or payback claim. The useful comparison is between the real operating needs of your pool and the options that meet them.
For more background, read our guide to variable speed pumps and energy efficiency in Florida and our pump repair vs. replacement guide.