I have owned/own both RANS and Kitfox. Similar in performance with the KF slightly faster but the RANS has the slight edge on STOL (I said Slight). The one I still have fits my mission better and that's what it basically comes down to.

A tandem vs. side by side seating might be all that seperates your final decision. Tandem has more personal space for each passenger but then if the spouse likes to ride, they generally like sitting next to their significant other.