It would be great if GitLab let you view build reports in the browser, but it currently does not. Until it does, the comparison should reflect the actual situation.
(https://gitlab.com/gitlab-org/gitlab-ce/issues/13227, https://gitlab.com/gitlab-org/gitlab-ce/issues/18664, https://gitlab.com/gitlab-org/gitlab-ce/issues/17081, https://gitlab.com/gitlab-org/gitlab-ce/issues/10982, https://gitlab.com/gitlab-org/gitlab-ce/issues/23618, etc)