I recently pulled the trigger on a L5030HSTC, but did spend some time looking at the new Deere cab models as well. Here's what I determined:
1. Both have excellent engines. The Kubota is rock-solid, and used in a variety of other equipment, just like the Deere. The indirect injection is slightly quieter, though, and I viewed the lack of a turbo as one less thing to worry about and/or go wrong. The 4720 obviously has more power, and in that respect, a more direct comparison is probably the 4520.
2. The Kubota HST trans is the cream of the crop. I've played around with the LoadMatch feature on the Deere's, but even with all the loader work I do I never found this to be anything terribly compelling. That's just my opinion, though.
3. The mechanical cruise on the Kubota was far more appealing than anything electronic. I found that I always "fought" the electronic setup on my NH TC40D, but the simplistic lever & pedal arrangement of the Kubota was a joy to operate. It also allows you to use either brake pedal at the end of rows, and with the electronic speedo, you can reset it to exactly the same speed every time. My NH only would brake in one direction, otherwise it would shut off the cruise. I'm not sure of exactly how the Deere works in that regard.
4. Having used both a "banana shaped" treadle and the dual pedal arrangement, I prefer the treadle on a HST. The preference comes from doing work in reverse, such as when mowing, blading, etc. With a treadle, you just stomp on the back of the pedal, which is close to the seat. This keeps your body in a comfortable sitting position, with your leg nearby, while you look backwards. With dual pedals, you have to stretch out and push the Reverse pedal forward, while trying to look and control things going backwards. I always found this to be less comfortable, especially if you do a lot of back & forth work.
5. I have no idea what I would use the increased implement hydraulics for on a CUT. I do utilize rear remotes for a top link, and for those implements that have hydraulics to raise or lower travel/height wheels, but beyond that, the higher 3-point lift capacity of the Kubota, and the easy-to-service external cylinders were more appealing. Ditto on the Cat 1 & 2 capabilities.
6. The Deere cab is superior, but I did not think it was substantially better. It is quieter, but I'm one of those folks who either has the radio on, or my iPod on. In either case, ambient noise is not a big factor. If everything else were equal, I think the Deere cab could put it over the top. However, things are never exactly equal.
7. The Deere cab is very new, though. I recall that Deere had all sorts of electrical gremlins with the release of 4010 series. Figuring that most any new product will have some bugs/issues within the first year or two, the older and proven cab setup of the Kubota was less worrisome to me.
..added on edit..
8. Forgot to address the loaders. The 853 is rated higher than the 400CX, and the Kubota front axle looks a lot beefier to me. Looks, obviously, can be deceiving, but both of those aspects added another notch in the Kubota column for me.
Given all of that, I leaned heavily towards the Kubota. Interestingly, my dealer is also a combined Deere and Kubota dealership, and has been for over 10 years. They have two locations -- one that deals with equipment up to about 90hp, and one across the Missouri River that sells everything up through the largest combines and articulated tractors. Both sites were frank with me in admitting that they see a lot more warranty work on the 4000 series Deere's then they do on the Kubotas. In fact, they admitted that they do very, very little warranty work on the Kubotas. So, when I coupled that with the other pros and cons that I was weighing, I happily selected the Orange tractor. It should be delivered here at the end of this week, just in time for Christmas! /forums/images/graemlins/smile.gif
Regards,
Jay