>>272024585
The Quest has higher native resolution and better black reproduction. It also has hardware IPD adjustment as opposed to the S's software only solution. 
The weaker hardware in the Quest itself means that games running on it often look worse than their PCVR versions but that isn't going to be an issue in Link'd mode. 
The Quest in native mode also only runs at 72hz, though there is some speculation that an unofficial mod could unlock 90hz while on link please do not take that as truth it may well never happen. 

If the Link is actually good then it will be a better choice than the S and i'm sorry to all S owners who that upsets but it is the simple truth. If the Link ISN'T good then no, the S will still be the superior device.