I think both of those are at 115v if I am not mistaken so the power usage will be slightly lower for the new pump as well as your turnover allowing you to run the pump for a shorter period of time saving even more.

Have you considered a two speed pump? The low speed will save you even more. Even with doubling the turnover for low speed, you will still save ~30% in energy costs over the 1 speed pump. The extra $100 for the 2 speed would be paid off in a few months.