>>332214864
Index is has better tracking and field of view. It also has up to 144hz mode(experimental though). It is slightly better but the Quest 2 does have almost everything the Index has at this point. Thing is if you want to get FBT, get better audio, battery life, better strap etc. You're gonna get close to the Index in price as well. The only real thing Quest has over index right now is wireless imo. Apparently there were some patents from valve that came out recently which showed that they might be releasing some kind of wireless module for the Index but who knows. 

I'd still go with Index over Quest 2 just for the better tracking and facebook walled garden console war bullshit.