Their current model is not, and I thought this might be addresses when Kubota entered their agreement with Land Pride. I've wanted a weight box on and off for a few years, and looked at this quite a bit. I came to the conclusion that, if and when I buy one, I will get the JD green designed for the I-Match, and a few cans of Kubota Orange. Maybe a decal or two, but it's just not worth (to me!) modifying the Kub unit to fit
Sacrilege I know, but there it is ...
Addendum ..
There is quite a a bit of difference in the QH models. I don't know if Deere still makes the fixed hook version of the I-Match, but after using the Land Pride for a good number of years,
never altering the position of the top hook, and losing more than a few clevis pins because that small hair pin gets knocked out in use, and finally switching to 1/2-20 bolts, which carry their own issues of imperfect application, that is the way I would go. If Deere now only makes the adjustable hook version like the Land pride, I'd get the LP.
Although, if you're talking about CAT 2 and up, you have other fixed hook options.
Sorry, forgot this one ..
BEFCO makes a CAT 1 or 2 Quick Hitch with a fixed hook. Nice ..
http://www.wikco.com/bquickhitch.html