Well, I sell all of these so I 'll try to give you a few things to consider. First JINMA and FARM PRO are the same tractor, so it will come down to dealer support and price leading you to a decision between these two. Some Jinma dealers order extra options to differentiate themselves, all essentials are included on Farm Pros, (two stage clutch, folding rops, etc.).
The 25/28HP JINMA/Farmpro use the same 3 cyl. engine as the KAMA TS254C. the 30/35HP JINMA/FARMPRO use a three cylinder 395 engine, the 35HP KAMA uses a 4 cylinder 485 direct injection (no glow plugs needed) engine. All of these are good engines, the direct injection is quicker starting by design.
The KAMA TS254C and TS354C use the same chassis, it is heavier and stronger than the 200 (25/28HP) JInmas, escpecially in the front axle, front differential area. Also the KAMA locates the steering cylinder above the front axle out of the way. I believe the 300 (30/35HP) JInma is comparable in chassis size. The KAMA has an improved clutch design, using separate fingers for main and PTO clutch disks which I think makes adjustment easier and also reduces the effort to work the clutch pedal.
Most KAMA dealers are stocking models with shuttle shift as standard, with 8 x8 transmission, the 200 series Jinma has creeper 3x2x2 (12 F 4R). the 30/35HP JInma is 8F 2 R without shuttle. Shuttle is available on the 200 series Jinma but it is only 6x6 becasue the basic trans is a three speed, with two ranges. Creeper is avialable on the KAMAs but is not usually in stock this way. (we will have some end of July). Creeper is handy if you plan to run a rototiller.
The KAMA TS Series is comparable to the Jinma LE series in style and features combined gages, wrap around headlight, spring suspension seat, etc.
Farm Pro is backed by a large national company who stands behind the warranty giving you a fall back if you have problems with your dealer. JINMA and KAMA are supported only by the selling dealer, as are most Chinese tractors sold.
As you can see, I am not making an effort to sell you on one over the other, If that is what you wanted, I appologize. Some of these differences may mean something to you and you can apply a value to them in making your comparison.
You can expect to get good service out of any of these tractors, We usually try to let the customer's needs and preferences decide which way to go. Go drive them and pay close attention to the dealers commitment, proper shop facilities? parts? etc.
Do you have any specific question that didn't get addressed?