Yes, it's compatible! But the tip is softer than the original s-pen.
As far as I'm concerned, this tip bends quite easily. Beware of breakage...

Here is my source before buying:
https://www.youtube.com/watch

No, according to our information it's only compatible with STAEDTLER Noris digital Styli (180 22, 180J 22, 18022G-1, 18022G-2, 18022G-3, 18022G-5, 18022-GC20).