From what the other folks have written, and from your assesment of your needs, I would say that either tractor will do what you need, but neither will do what you want because neither has a mid-PTO. If you feel that these are the 2 best choices for you, then I would pick the one that feels better. If the mid-PTO and a MMM is really something you think will help you work more effectively over the long run, then you may want to keep looking. I've used both RFM and MMM. Currently I'm using a MMM, but only because I ran out of storage space and the MMM takes less floor space than a RFM (simply because the MMM is attached to the tractor).
Again, pick the tractor you like better, both the Kioti or the Kubota will do the jobs. If you really want the MMM, then keep looking for something that will give you a mid-PTO.