When streaming PCVR to the Quest headset, the rendered image needs to be compressed, so this results in slightly worse image quality compared to the native Quest standalone app. The Quest standalone app also has better support for passthrough. On the other hand, PCVR has better codec support when using the DirectShow player backend with LAV filters. You might also get better framerate when using PCVR, since the RTX 4090 is much more powerful than the Quest3. I'd recommend testing both versions of the app with the free demo to see which you prefer.