I've wheeled with lot's of guys with both ARB's and OX's...overall I don't like either that much. But in any case, I would vote for the ARB's because I see less issues with them on the trail then the OX. Every single person I have seen on the trail with an OX always has troubles engaging it...the OX is definitely not immune to the "are both tires spinning" questions. While the lever in the cab has a positive engagement, that doesn't mean the diff is engaged. It just seems like every ride the OX guys are crawling underneath the vehicle adjusting the cable.

???