I have never heard of Kioto, but I do have a dealer within 30 minutes. I sent them an inquiry and will check it out.None of those tractors are going to pull a 900lb roller up a steep hill with turf tires more than likely. It's going to need R4's, which is going to bite into your grass and rip it up and cause ruts. There isn't going to be a ton of performance difference in that regard between the X504 and the 1025R... the kicker to the 1025R is going to be fuel consumption, the FEL, and the cat 0 ability.
You will see towing capacity difference between the two, but on flat land. Loading tires helps, but the 1025's tires are pretty small, so it would be indifferent for the most part. There isn't a huge price difference going to the 2032, but you do loose the TLB ability.
Do yourself a favor, and check out the Kioti CK2410, it's Kiotis' sub compact... it's a much beefier subcompact than a 1025... though it doesn't have the quick disconnect.
Do you have one? If so, likes/dislikes?
Thanks!