I agree with Carsten and want to add my experience. With S1, I get more false positives and resource consumption is a little bit more. Currently, I'm using CD and happy using it. MDR Services is provided by its own staff, not 3rd party. Single-click rollback is a plus with…
Check for EDR in the beginning. If EDR does not provide you sufficient information, then XDR won't satisfy your needs. Keep that in mind that the term XDR is overly abused by vendors.
These two solutions are more like complementary tools.
However, if you "really" have a security team that works 24/7, then you might not need an AV but this team should be really competent. Otherwise, it won't produce the result you're expecting.
