>>413960986
If it's 2130P it's the same one in the Quest 2 and Pico 4. As the Pico shows you can uptier the RAM while using the same chip.

>>413962162
XR2+ Gen1 (the one in the Quest pro) isn't exclusive, Lenovo announced a headset with it late last year and Qualcomm have stated that other OEMs are using it.