I think it is safe to say that farm pro / jinma ( chineese tractor) is coming into its own as a discount/ economy '3rd' brand. However.. due to price and manufacturing process.. it just is a hard comparison to a 'big 3' brand like NH or JD. In other words.. it's hard to compair a 7k$ tractor to a 12k$ tractor. Besides. Chineese tractor value/price starts to erode a bit at the upper end of the hp range. A small jinma like a 204 / 20hp in the 3500$ range just blows away any other new tractor in the 20hp range. Sometimes by a factor of 2-3x As you move up in hp.. that price/value drops to as low as 1.5.
I also look at the 'tinker' quotent. I like antique tractor / old gas tractors... I have a high 'tinker' threshold.. Meaning.. I don't mind if I have to tinker with the tractor to make it run, keep it running, or otherwise attend to special needs for operation. Most 'big 3' tractors will be low on the tinker quotent.. meaning that in-between servicing.. little or nothing is required to keep them in operating condition, or no post delivery actions need to be taken after the dealer drops it off at your door, prior to use. Thos users that like 'hands off' tractor work.. or like their tractor to be as completely ergonomic or hands off / trouble free as a modern automobile.. should probably not get an antique tractor.. or a '3rd' brand.
Just for reference... here's my overall 'idea' of what I'm refering to as #1,2,3 brands. Being in a number does not denote more or less quality specifically.. but may also take into account market share and distribution, pricing, availability, and even history / age. etc. These tend to be soft designations, and some makes may actually be in transition, or not sit cleanly in one category.. etc. Don't be offended if your tractor falls in a category lower than what you think it is, or should be...
For reference.. I lump NH, JD, and kub as 'big 3'. Mf fits there as well as case.
I would rate makes like: agco variants, kioti, mahindra, etc as #2 brands. ( challanger is a hard fit. No doubt it is a #1 in quality.. but for distribution.. perhaps better in a #2 slot?) (And.. kioto popularity and reputation is growing.. perhaps it is also a transition between #1 and #2 ? ) Deutz and zetor may fall here as well.
#3's being branson, jinma varaints, benye, foton and variants, eicher, montanna .. etc. ( branson may be on the move to #2.. again.. a hard to place unit ).
Soundguy