</font><font color="blue" class="small">( That would be the deal breaker for me.. I don't like the foot pedals. TREDDLE + TURN BRAKES ON WRONG SIDE = NOPE NOT FOR ME PLEASE! If Kubota fixed this ergonomic issue, I would have considered buying one.... )</font>
I just bought a JD 4720 in November. The above issues, along with the turbo, are what basically made my decision. I was very impressed with the Kubota L5030 and thought it might actually be the more reliable machine. However, at my altitude (5800 feet), the turbo makes a big difference in actual horsepower.
I also did not like the Kubota pedals, but my guess is that you get used to whatever you use. And like others have mentioned, I couldn't see any possible way that you could use the turning brakes on the 'bota.
I thought I liked the Kubota "cruise control" better when I tested them, but after using my Deere, I really like how it works. Even without the automotive style cruse control upgrade, I can set the cruise and then tweak it down to precisely the speed I want. I can see how that would be very useful for applying fetilizer or other sprays in getting the precise speed.
Like others have said, I don't think you can really go wrong with either brand. I'm happy I bought Deere, but I don't know anybody that regrets buying a Kubota.