I have never owned a Commander but I have owned several Can Ams and I can tell you the front diff SUCKS! I have been going through some deep mud and didn't want to get covered so I would try to ease through. The problem was I only had 3 wheel drive. I would have to stand on the gas to make the 4th wheel pull. Needless to say I would be covered in mud. It is a shitty design from a shitty company.
I have heard my S front diff make some noise but I have NEVER heard my XP do it. My S had the good sprague and billet pinion cover but still sometimes it would make that noise but it never broke.