Winning what game? I can't find solid numbers about bug-tracker marketshare, but if I type "FogBugz vs" into Google, it throws up Jira as the first result. If I type "Jira vs", FogBuz doesn't show up -- I get Rally, Trello, TFS, Redmine, and Asana first.
FogBugz definitely used to have a lot of mindshare, but...