What are the unique features or approaches of Bugzilla compared to Jira? Before Jira was a thing, Redmine was (is?) very popular and often received better revie

What are the unique features or approaches of Bugzilla compared to Jira? Before Jira was a thing, Redmine was (is?) very popular and often received better reviews than Bugzilla, so I was a bit surprised you mentioned Bugzilla.