It depends on your location and the individual dealership. Check dealer reviews online and talk around with others around you that own Kubotas.
A few years ago, my wife's BMW 328D (diesel) started acting up on a long road trip. We had bought the car brand new a few years earlier in Los Angeles. Going in for service in LA for high end cars is a bit intimidating. They take you into an office, like buying a car. At that point you know it's going to be expensive! "Here's a free cup of coffee. Did you bring lots of money?" Lol . That's the feeling.
So, anyway, we broke down near Amarillo Texas, found a BMW dealer and limped it in. That Amarillo dealership was totally different than an LA dealership. It was more like getting Ford service work done. Not too many beemers in that part of Texas, I gathered. We left the car there, rented an unlimited mileage Toyota and completed the trip. Returned to Amarillo about 10 days later, hoping for a low repair bill from the beemer dealer. Dealer says, "Well, we found metal shavings in the fuel filter, and had to replace the ENTIRE fuel system. Tank, lines, injectors, etc etc. Total bill is just over $8,000. But your cost is ZERO, as BMW covered it completely. No charge!" I don't know what would have happened if we had it repaired in CA.
So, In my case, further away from the purchasing dealer, was better.
Edit: For the record, about a year later a recall came out to replace the fuel pump on BMW 328D's due to metal shavings caused by a disintegrating fuel pump. I think the CA dealer would have charged me full price without a recall in effect. Even though the CA dealer was a good one, and I'd bought 3 BMW
's from them over the years. (Now, I'm retired and broke. So although I loved them. My BMW days are almost over. Got 1 left.. ) LOL