I remember a while back I was predicting the Switch 2 to be something like a GTX 1650, with the Series S something like the 1660 Super. That is pretty much what we're seeing here in terms of performance difference. Basically games that run 60fps or variable 45-60fps on Series S will tend to run 30fps or variable 30-50 fps on Switch 2, unless they are older and not really pushing the Series S. Some very minor compromises will be made, and typically when a compromise is made on one platform it is also made on the other (with a few exceptions -- i.e Fortnite having Lumen & Nanite.)
This gap can be bridged in some ways with DLSS, as well as the memory capacity advantage for Switch 2 and as developers become more familiar with the platform, but that is pretty much the typical gap.
