If the Ferris has the single hydro pump made by Eaton, it is low pressure and bullet proof as hydro's go. my dates back to 87 with a 12hp iron Kohler. Its work load is just doing my brothers place once a week, semi retired. The Eaton is not a zero turn and needs brakes to turn it. I think my old Ferris deck cuts better than my 2001 Hustler with Upper Deck when it comes to low dry thin grass. Probably a back pressure issue on the Hustler's upper deck and to be fair that's when I had 8 blades on the upper deck, it's better with 4 and have not tried it with 2 or 0 blades.
At least with the Ferris the belts and pulley system is bigger than my Hustlers but we are comparing mowers that are year apart. Ferris has been kind of an odd duck until their full suspension model got the attention of some guys. I find mine as beefy as it gets with good thought made to access concerning repair panels with rubber straps for no tool, no rattle excess. On my Hustler, I'm always looking for the wrench and drilling a frame only allows for rust after a while. My Ferris even fell off a truck, about three feet. My brother still can't kill it.
Most of these comparisons are worthless because these guy mostly use the same hydro pumps, wheel motor, engines ect. To me it boils down the way another company puts it all together and the way that deck cuts.
Next mower I get, I will look at Exmark, Hustler, Walker and Ferris.