I'm planning a new pool build and am trying to learn quickly. My builder suggested a 1.65 hp Jandy variable speed pump. The pool is going to be about 14,000 gallons. If our goal is just a certain gpm out of the pump while minimizing energy usage, and both pumps are variable speed, does having a larger pump provide any benefit? The manual shows a power curve for both pumps that is not that different at the same RPMs, but it's hard to tell how that might impact energy usage. Any guidance?