Obviously the Rincon has fewer miles and all, but it's more $ also. Honestly, I don't think you can go wrong with the Foreman either. If you don't have to have a Warn winch, you can put a superwinch, etc on for $80 for the winch and $30-$40 for the mounting kit.
On the other hand...... I see the Foreman is a ES - is the Rincon an AT? Also, the Rincon has IRS and the Forman has a solid rear axle. ...at least I think so. Just something to consider.