Switching from VR to Monitor View results in FPS breakdown

Did anybody else notice that you can control tab between vr and monitor with fewer issues if the pc graphics settings and vr graphics settings are the same? I have been changing a lot of things lately so maybe it was something else, but I used to have fps slowdowns requiring reboot after switching and now I do not. It works with ultra settings fine too if they are set the same. Can anyone else confirm the behavior?