As a owner of a Rift S, I would say get the Rift S (if you can find one) for PC games, or the Quest if you want un-tethered mobile-type games.
The problem the Quest has for PC games is that it uses compression, so a little bit more overhead for your PC, and a wee-bit of latency. On my mate's son's Quest, I could see compression artifacts in dark areas, as well as complex scenes involving smoke or fog effects - the compression seemed to have a few problems dealing with smoke and fog. Also, tethered via USB on a Quest it's limited to 6Gb a second bandwidth, on a Rift S it's as fast as your display port can handle - so 36Gb approx.
Quest is also heavier due to the added batteries in the headset, as well as having to charge it every 3-4 hours.
So.
Quest Pros - Un-tethered for native games, can play PC games with USB link cable, great controllers. Cons:- Tethered uses compression, some latency, and a heavier headset.
Rift S Pros - Best for PC VR games, great specs, superb screen - very little screen door effect, if any, great controllers (same as Quest), more comfy to wear due to lighter headset. Cons:- Tethered to PC, fairly low FOV and refresh rate 80Hz - although this hasn't bothered me.
Major cons for both IF you don't do social media :- Oculus is owned by Facebook, and Facebook are starting to get their fingers into the software for these headsets. For example, to now use "Home" features of both headsets REQUIRES a Facebook account. This bothers some, including myself as I don't use social media. So if you don't mind having a sort of Facebook spying device in your home then both headsets are great.
