What information are you looking for exactly?
I had a 120xl with the QD... worked great, no problems. A friend has it now. Again, no problems. I can only assume any redesign, especially when given a new name, has gone through improvements. Time and money doesn't get spent on a redesign/update, and called out, to make things worse.
The real question is... is it working ok for you???
Elos has always been a bit tight lipped on giving out details on the QD design. It's unique to the industry.
I literally don't know what the GPH is that it can handle. I ordered the tank with a Quiet Drain 2, but it came with this. Honestly, this overflow looks really crappy. The lid itself looks like the cheapest spare piece of plastic you can find (I don't even think it's acrylic). If you look at the Quiet Drain 2, it looks much higher quality and nicer. There's also the same really tacky black plastic glued to the glass around where the drain is, again looking way worse than the Quiet Drain 2.
I've had an ELOS before, probably the first version of the Quiet Drain, and it at least looked much better.
My concern in summary:
1. No idea the GPH it should handle
2. Looks pretty crummy, what is it even
I can't get it working because the stand they sent me is faulty and poorly done (they've admitted it and are trying to send a new one, but it's taking a long time as well). The screws they gave me also extend so far that it completely blocks all the plumbing, so that doesn't work either. Since I'm not going to be using this stand (whole other discussion), it makes no sense to set it up yet.
I think you're pinning this on me being sh*tty with all the question marks, but excuse me, I paid a ton of money for something that I didn't get, I really need to know what it is. I don't need to know all the specifics, but at least give me the dang GPH it can handle.
If you look it up, they talk about the Quiet Drain 2 all over the place. There's official PDF's and Francois even sent me the actual PDF for the Quiet Drain 2, even though the tank did NOT come with it.
I can only assume the redesign improved things as well, but I have no idea and am a bit skeptical especially because of how cheap this thing looks relative to the Quiet Drain 2 and what I had 10+ years ago.