There isn't really very much too it, I suspect you're overthinking it. They're lights at the end of the day. They'll all light your tank up, and they'll all do it equally well. It's just some will give you more control of the light being output than the others. Sure @Hanuman's point on the power supplies is a valid one (and I've actually upgrade mine to a chunky 10A metal Meanwell one to run my three T90 Pros, as a) I wanted a better PSU, and b) I only wanted one run of cabling from the adjacent room), but aside from that its all much of a muchness - all the listed manufacturers (ADA, UNS, Chihiros, Week Aqua etc) produce good quality RGB lights with good colour rendition. The decision does come down to desired functionality and form factor.
I suspect its just the case of an OEM manufacturer deciding to start producing a finished product to sell directly to end users, and the teething issues that brings. They can do the hardware just fine and that has been their focus, but the software is something the third party brand normally handles, so they are now playing catch-up realising that arguably the software and usability are of equal, if not greater, importance than the hardware.
