Hi All. Yes, they are supposedly more quiet and energy efficient. The good news is that we do have them on order and they should be here end of the month. We have multiple in-sump and external recirculating models coming in. Plus a few other new goodies too. But we're not brining in the open volute design.
There are probably a few other small benefits of the DC-controllable skimmer pumps. Like toning it down when you're feeding something (food or supplement) that would normally over-activate the skimmer. Or being able to really fine-tune the skimmer between the air draw & water level. IMO it's wouldn't be worth paying a lot more for it, but luckily it's not much more than the other high-end skimmer pumps we do.