Can I play with the xbox one s against players with the xbox one?

My friend has the Xbox one but I want to buy the Xbox one, can we play together or do we have to have the same console?

and can you also play on the xbox one with the controller from the xbox one s? So thought that if I buy the xbox one s i can take the controller with me to my friend and we can then play together on the xbox one?

Yes will work

So is xbox one compatible with the whole xbox one series?

Yes

Are you sure about that? Not that I get it and it doesn't work haha

Yes you can do both

Yes

Yes, also with the Xbox one x

Yes, both are possible.

A One remains a One whether normal, S or One X. Everything compatible with each other.

I play with my One X with my brother who had a One and has now switched to a One S. The entire One Generation is compatible with each other.