>>268124754
Just comparing headset hardware, the Quest is better than the Rift S in several ways (oled screen, higher resolution, physical ipd adjustment)
Rift S advantage is an extra tracking camera and lighter with arguably better comfort. 

Both headsets cost the same.

The biggest Rift S advantage is you can play pc vr games whereas the Quest is stuck with a mobile processor and a limited library of lower quality graphics. Being able to tether a Quest to a pc and use it as a standard pc headset takes that advantage away from the Rift S.

Of course there may be unexpected problems like compression or usb compatibility or cable length or whatever that make Quest Link unappealing as a mainline pc headset, hence the wait and see, but if it's good Rift S is dead, so maybe wait a few months unless you really need that headset now.