Is the comment like Moodle's general feedback?
Installing and upgrading help
Migrating quiz from Fronter to Moodle?
Yes my first idea was that Fronter comment was like Moodle's general feedback and first question seems to support this idea well.
But second question where feedback is "Check all answers that apply" makes me wonder if it should be displayed during attempt or as a feedback. Better to wait for Fronter users comments.