I will touch on two units here.
Original ride on I had was a Kubota T1560 I bought in 2002 or so. Solid unit all the way around. If you have rough ground to mow on I can highly recommend the unit. The suspension really works and saves your back. Mine ran 15yrs with little to no maintenance and it held up great considering. The bagger system was deck powered and solid. It would only clog when trying to mow too fast in tall and wet grass (trying to mow between rainstorms).
I bought a Ferris 400S in 2018 to replace the Kubota. My 1st Zero turn. I went Ferris for the suspension system. Great mower so far. There was a learning curve and I still make the occasional spin mark turning. The deck had supposedly been leveled by the dealer, but I was getting a lip in the cut on one side and was worse when turning, so I re-adjusted it a hair and that stopped the issue. It has cut my mow times by 2/3 and has my lawn looking the best it has in years, I simply love this mower so far. To the point I have taken over mowing duties from my son who is less than happy at losing a source of allowance. I just find it relaxing to put music on and cut the lawn now, it is my 1hr escape from everything. I have even taken to alternating cut pattern each week, both to stop ruts from the mower weight, but also because the deck cuts so well it makes a nice pattern. I will give the Ferris a sold A-, pricing was inline with other comparable machines but it adds suspension which for me was important. Everything is pretty accessible for maintenance.
I added the turbo-pro bagger system late last year. The bagger I will say is not great. For some reason Ferris designed it so it really chokes down the exit from the deck and the blades of the fan system are not down in the grass path to help force it thru. It tries to use a venturi type effect to move the grass. With the heavy grass here in western Wa (why I needed a bagger as mulching does not work), the system just does not work well and is prone to clogging at the deck where it cannot be reached without pulling the assembly of the deck. The Kubota bagger system did not restrict the deck exit and had the fan down in the discharge path physically moving the grass, it would only clog if the grass was extremely high and wet. Unlike the Kubota I cannot hear it change pitch either when it is starting to backup and give me a chance to slow down or stop to let it clear itself. No warning until I start to see the deck spit grass out the front corner after the chute is fully clogged. I give the bagger a D. The unit is solidly built, materials look durable, but it was extremely expensive and the design just does not work that well.