I have an Agorfarm 100 and have been very pleased with it. I think the difference in the 420 and 100 is mainly the transmission. I think the 420 is 40/40 speed and the 100 is 20/20 speed. I also have a Stoll loader with open bottom root grapple, bucket, and forks. It's a good combination and the tractor handles it well. Got just over 600 hours on it now and no problems. It's very good on fuel for the HP.