Yes, I saw that pre-wired option, but i guess i'd just get the bare ones because you don't always know what units you will be installing and what the terminations will be like.
I've used the other two units and frankly they just save so much time, are easy to pop into the ceiling, and have a quality feel. I am a huge fan of Wagos, but when you add the cost of the Wagobox enclosures to make them MF, I htink the Quickwire units win the prize for downlight installations.
The T-Connectors aren't MF, but I don't see that as a problem given how compact they are for inserting and fishing-out of ceilings.