What exactly is the difference between Electrs and EPS?
EPS is focused for single-wallet usage.
Electrs can be used with any amount of unrelated wallets. Also can be used by block explorer (if you install one).
Can Electrs also be privatized?
Or does that only work with EPS?
Or does that only work with EPS?
I'm not sure what you mean here. I've always user Electrs locally and didn't expose it to the internet, it works very good like that. But I don't know if or where would be the settings Electrs would advertise itself as Electrum Server. However, since I have no port forwarding done for it, I'm not concerned.
On the other hand, I've done tests with another server, Fulcrum, and there I had to explicitly disable its announcing to get to same behavior as I have with Electrs.
And in case of loss or damage, do I have to save seeds and public keys to restore my multisig wallet and move money or are just the seeds enough?
In theory the seeds should be enough to re-create the wallet if it's the case.
Just imagine: from the seeds you can restore the original 3 wallets. And I guess that from the 3 original wallets the multisig one can also be re-created. I don't see any reason to not be like that, but you can easily try this when you have the devices (or wait until you get answers from somebody who has actually done that).
