You are correct, LS builds both New Holland and Case compact tractors.
I really think LS fit and finish is right up there with the best of them. I think this was a benefit of their partnership with Case/New Holland, is that CNH required this as they compete with John Deere. When the partnership started, that is really when LS upped their game.
Of the 3 Korean brands, I believe LS has the best Fit & Finish followed closely with Kioti which does a decent job. TYM is the overall value leader but is a good ways behind LS and Kioti, and most other tractor brands as far as overal fit and finish goes. TYM isn’t bad, especially compared to older machines, but not up to current standards other manufacturers are doing now.