I guess I have some experience for you. I had a 4100. Loved it, very maneuverable, nice little tractor. I wanted more PTO HP for a snowblower I built, and heavier tractor in general for loader operations, so two years ago I sold the 4100 and bought a 2520. Super tractor! The longer frame and more weight makes for a much more capable loader tractor. And just about enough HP for just about everything the tractor frame is capable of. Most every attachment I had for the 4100 fit the 2520, except I had to lengthen the driveshaft for power to the front quick tach for the blower. No big problem there. Here it is two years later and I find myself needing to upgrade the power again. I need enough for a small square baler (without wagon). Also looking forward to having a loader mounted to the frame at the sides and front again, like the 4100 was, and the 2520 was not. Look into the differences in the loader mounting. The 300CX mounts at the front of the tractor frame like your 410 loader does now. The 200CX loader mounts at the side pillars only. It is an interesting difference. Good luck.