OK, thanks again. So it looks like they are interchangeable, yes??? I even called Hayward, they said so, too. BUT: they also said the amp draw on BOTH is IDENTICAL on SP3010X15AZ and SP3010EEAZ. How can one be more energy efficient if they draw the same amps? On the Inyo chart, this looks different, with a lower amp on the EE pump. To make me even more confused, the manual has a KW number that is 1.1 for the regular and .75 for the EE. And it states to make sure one has the correct wire for the KW number. So is this a problem when installing? I actually ordered the EE already, but now I'm STILL not sure if it was the right move? Thanks....