Even though you downsized the pump, you may find that you will end up using more energy because you no longer have low speed to fall back on.
First, running your old pump at 1.5 hours on high and only 2.5 hours on low would not have been even 1 turnover a day. You would have needed to run closer to 5 hours on low speed. But I'm not sure how you got to 25 amps or did you mean 25 amp-hours. Label amps are not all that accurate to actual energy usage. But given those schedules, running your new pump at 4 hours per day will likely cost you more money than what your old did.
The WFDS-6 should have used about 2 kw on high and 460 watts on low with a turnover rate of about 3.4 hours on high and 6.8 hours on low. The new motor should use about 1.5 kw.
So your old pump should have used about 4 kwh on your old schedule while the new pump would use 6 kwh on your new schedule. However, had you set up the old pump for a 25%/75% (1 hr/5 hr) split of one turnover, the energy use per day would have sill been about 4 kwh but you would have had a full turnover. The old pump had the advantage of low speed which can save quite a bit in energy costs.