I have the 2502 but if I had the 2501, I seriously doubt I would spend the money to upgrade. Not having a clutch is nice and the brakes really need to be on the left like they are on the 2502, but I don't know if that change would be worth a few thousand to me. It does make it very simple to quickly set the parking brake! The suspension seat on the 2502 is very nice though, one of my favorite features. Working the electric PTO is a breeze, turn the knob and letter rip.
But if you are wanting a new machine and are like me and want no part of an emissions tractor, the 2502 is a great choice. I have had mine for over a year now and have worked the snot out of it doing things I probably shouldn't even think of, and have not had one single issue. There are times I think about the 3560 I almost bought but then I remind myself that I have no DPF, no electronics, no sensors telling my engine how to run or not run, and I don't need computers to work on it. It's all old skool and simple just how I like it.