I cut the centers out and put them in the middle of the wheel. I used a 4 1/2" grinder and a gie grinder to cut the center loose then welded back in. The wheels should be the same, someone has changed one.
Leejohn, thanks for the reply! You're exactly correct. Either the PO gave me a "gift" or he bought it this way, but one wheel is a 12" rim and the other a 14" rim, thus the reason they are different and one won't reverse. I guess I will swing by my Kubota dealer and see if I can do a swap of a rim/tire to get them to match.