A couple things:
(1) This beta has a bug that forces your headset to run at 72Hz no matter what setting you choose. This is part of the reason for people seeing “performance improvements,” because it frees up performance headroom.
(2) This beta fixed the frame sync problem that previously required us to set V-Sync to “fast” in the Nvidia control panel. Now even without that setting, the frame rate syncs correctly and ASW is more stable, as well as allowing the sim to reach the full refresh rate of the headset which wasn’t possible before (unless V-Sync was set to “fast”).
Beyond that, I’m not seeing anything any different than prior versions.