>>314220354
Index Cons:

Price
No ability to swap batteries in the controllers.
The headset is hot and less comfortable.
Once it is setup it is not really mobile.
Index reliability issues.
Long Wait to actually get the headset.

Rift S Cons:

Poor Audio

Image quality is not bad due to the good lenses, but it is not as good as the index.
Inside out tracking.
No out of the box FBT supports
New users need to link thier Facebook account to use it.
Controllers don't stay in your hands, requiring you to constantly hold them.
Rift S vs Valve Index

Index Pros:

Image Quality is better, it's not extreme, but it is noticeable like 1080p to 1440p
Finger tracking is nice, although it is a bit gimmicky.
Outside-in tracking is just better for tracking the controllers.
Being able to use just Steam Vr and not deal with Oculus's BS.
It just works with full body, no third party software and recalibrating your trackers to your headset everytime you restart vr.
Audio is WAY better, it's not even a contest.
Not having to hold your controllers to have them stay in your hands is a big plus.

Rift S Pros:

Price
It is lighter, and much more comfortable and has better airflow.
Mobility, you can bring your laptop and headset with you anywhere and be in VR in less than five minutes.
UI, Oculus virtual desktop works better and is easier to use and room setup is easier.
Controllers that use AA batteries that last 30 hours is nice if you play a lot or forget to charge your controllers.
Access to Oculus exclusive games without third party software