Arthr,
Most important is hydraulic flow when running a splitter.
Figure the volume in gallons of the cylinder, then the flow on your pump and see if it will be fast enough. The flow will be rated in cc/rev, but that isn't hard to convert. We put a splitter on a YM1510D once and it was really slow, even at 2400 rpm. It had plently of power, but took 15 or 20 seconds to fully retract or extend the ram. That seems like hours in practical use.
These tractors run loaders fairly well, so you might assume they will run a splitter just fine, but you are usually looking at a pair of 1-1/2 or 1-3/4 inch rams on a loader. Two 1-1/2" rams require only about a quarter of the flow that one 4" ram requires to extent/retract at the same rate.
I think I am anbout to confuse myself, so I better get back to work!