Two other things to consider.
Will you ONLY mow? If so get the x758, but if you want to do other things, like loader work, get the 1025r.
The other thing is the ROPS on the 1025r. Can it get everywhere you need to mow? A friend has a 1023e and had broke tree branches with the ROPS. He also broke off one of the high mounted lights on the ROPS. After breaking the one light, he moved them to the inside (for better protection), then with the ROPS folded down, hit a branch backing up. The top of ROPS (part that folds) hit the inside mounted lights and broke both of them off the ROPS. He told me if the ROPS came off it would be off. But it also has mounts for the fenders and hitch mount.