I think that it's important to remember that just because a tractor or component is made by another company, it doesn't mean that the product which the producing company makes under its own name is the same as the product that they produce under another company's name. For example, just because a New Holland Boomer is made by LS, doesn't mean that a similar NH and LS model are exactly the same. Lift capacities, hydraulic flow, weight, etc. might be different even though the tractors seem very similar. Companies who outsource some or all of their manufacturing submit a request for a manufacturer to build to a specification. The outsourcing company may request a different specification than what the producing company sells under their own name. It is important to look at a tractor for its own individual features and specifications and not just it manufacturer.
As G Man stated, while it may be the case sometimes, like you mentioned, in the case of LS, the Boomer series, and the comparable case tractors... There is literally no difference between the new LS tractors, boomers, and case. Except, of course, the paint and details.
Aside from the tractor, LS uses their own loader, well New Holland and case use the identical loader, labeled differently of course.
In the case of the Bobcat tractors, along with McCormick, they are both built identically to the Kioti tractors, which is the flagship for Daedong. .. The manufacturing company that makes the tractors. Again, the differences are paint and details. Although, the options that are added at the factory may differ across the brands. For example, Bobcat did not add draft control or a hydraulic remote when they have them built, which is different from the Kioti build. And again, the main difference is the leader, of which each of those companies use their own.
And please excuse any silly grammar mistakes, I'm using the speech to text function on my phone right now, and it does weird things to sentences sometimes