>>271417463
It's not exactly the same, but both have inside-out tracking. I've heard Rift S tracking is supposedly better though.
Rift S is the best entry level PCVR headset.
Quest+Link looks like it'll be a good option if you want to be able to use it standalone too.
Index is the best consumer headset right now, but it's not really $600 better than a Rift S.
Vive is outdated, the only reason to get one would be if you can find one really cheap.