Wagtail is my go too on all my jobs! Have 2 - 12" and 2 -18" All residential though. Fought with Moerman tools for 2 years. Wagtail is awesome. Dogeared the channel with a Dremel tool zero detail!
Ive used both and i can say the pivot on the wagtail is a lot easier to control... the moerman handle i use with brass but i only use the pivot on pole... all in all the wagtail is a better overall tool especially for piece work windows that are regularly cleaned, you will fly through drops with this.
But if u were wanting to decide between the moerman version of this id go with the wagtail, a lot more simple design, easier to control, the only thing thats better about the moerman is that the muff part hold more water... but if u wsnted to somehow put another pad on the wagtail u can do that ive seen it done
Mostly for support, helps keep more stable and in the video i have a little troubke reaching on opposite sides so the suction cup i can use it to pull myself over to clean it.
It's called the wagtail high flyer. It's good. But only for commercial cleaning. Residential I'd stick to regular equipment. Does a better job. Thus is purely for speed without focusing on detailing.