This video measures the frame rate for the PSSR1 and PSSR2 settings in Gran Turismo 7 running on a PlayStation 5 Pro.
For this comparison, the Graphics Priority for PlayStation Pro setting is set to Prioritize Ray Tracing/Resolution, 120 Hz output is enabled, and the Using PSSR on PlayStation 5 Pro setting is Enabled for both PSSR1 and PSSR2.
For this comparison, Motion Blur, Camera Shake and Film Grain are all disabled.
To measure the frame rate, the FPS counter of the LG B4 TV is used. To make the comparison as fair as possible, only the gameplay replays are captured.
You can find the video below:
PSSR2 averages a little bit faster than PSSR1 when it comes to FPS. With that said, in some brief scenes, PSSR1 can produce a slightly higher frame rate.