Ok, your questions are vague to say the least!
But here goes..........
How they work for people? How does the corporation work for people - or how does the equipment work for people?
I would say both do very well!!!!
The constant PTO rpm feature - unless I am way off base - I am sure a computer regulates the fuel to keep the rpm at the correct setting, I would imagine that works well too. However - I have never had a computer on any of my Kubotas.
The Bi-speed turning has been out a while - simply put, when the front end is turned more than 25 degrees it kicks in the bi-turn, forcing the machine to turn much sharper than normal - again, no experience with this feature, I have seen it on Kubota lawn mowers and it does allow a sharper turning radius.
Lastly - and more importantly .... do Kubota's last? mmmmmmmmmm..................
Years or Hours?
This boils down to user upkeep and maintenance. They only snafu I would think on the newer machines is the computers - they crap out, no easy fix. Also on the big boys you have DPF and regenerations all that fun stuff too.
But do they last? I have 3 that are 30 years old - run like a bull through a china shop.
ARE you getting the wheeled version or the Krawler version?
Next question - why did you pick THIS version of Kubota tractor? You have an orchard? Or narrow farm scenario ?