It's possible to compare groups within one feedback form in the Starred Dashboard. For example, you can compare the NPS Promoters with the Critics, who gave feedback and you can also compare groups you made yourself. If you want to create groups and want to know more, click here!
To compare these groups, go to your dashboard and select the form you want to see. Then, select the first group at Group A and the second group at Group B (see example). You get a comparison of the results in the Dashboard.