>>268535869
Well the S has the advantages already listed, the Quest is obviously wireless without Link but without Link is limited to its own content store. Has worse tracking due to one less camera, has a higher resolution but lower contrast and refresh screen. 

It basically comes down to; do you care about using it away from your computer. If yes, get Quest it'll do PCVR well enough, if no then get S it'll do PCVR better. 
The S MAY be getting a price discount soon though so sit on your hands a little.