For anyone interested,
The reason there are yellow Fendt tractors and green Challenger tractors is that in order for Challenger/Cat dealers in the states to sell Fendt they paint them yellow and throw on a Challenger badge, and the same applies to the Fendt dealers in Europe selling the tracked tractors. The main difference between a Challenger 1000 and a Fendt 1000 is the warranty and the joystick. The Fendts warranty is three years or 3000 hours with maintenance program service intervals are at 50 hours, then at 500-hour intervals until 3000 hours or 3 years, whichever comes first. This is where Fendt will cover service, labor, and parts during the 3 year/3000 hours agricultural use warranty period. Whereas the Challenger 1000s still have a warranty but not quite like the Fendt 1000s do, and I currently don't know the conditions of their warranty. Also, the joystick is dumbed down in the Challenger so it no longer has two hydraulic control switches and has only two "Teach In/Accufield Command" function buttons whereas the Fendt has four. but other than the color and a few small other things they are the same tractor and are built in the same factory. And as far as the tracked tractors, the Challenger MT700/Fendt MT900 and the Challenger MT800E/Fendt 1100 they are exactly the same other than the color as far as I know.