Don is correct.
Different engine (more HP), two speed range, bigger tire options on the 93. 9250 was the smaller/lighter model, 9350 was the cadilac, but otherwise same frame and components. Seen lots of 9250's with the optional equip that make them look very similar. No real difference in reliability or capability other that some ground clearance and HP. Bevel gear box is the only weak spot imo. Also some replacement parts for the 9250 with the single speed auburn power wheel are not made anymore, so that can get $$$.
If your planning to mow with it, especially with those rough hay fields, I would strongly consider forked vs the formed rear casters.
Also don't be scared of goint to a 2 series if there isn't much price difference. They are just built heavier.