There's no need for speculation.
It says right on the LTT website
The ratchet is based on megapro's long-standing & reliable design, but has been significantly modified to suit our needs
And they have said that they worked with megapro for the ratchet mechanism .
LTT isn’t a manufacturer.
I disagree, they are a manufacturer.
Only the ratchet was loosely based on megapro's design, they had the rest of it manufactured themselves.
They had steel tooling made and shipped to china for injection molding, went over to the factory to setup the lines. etc.
There's a bunch of videos about it.