Airplay VS optical conversion cable

[Dreuther]

Reactors are ordered and want to use them with my tv. Is airplay a better connection versus the optical cable to 3.5mm conversion or vice versa?

I use Apple TV and stream all my content. 

If the cable is preferred does it need to go in both or is one fine?

TIA

My Reactor 900 pair is connected via optical cable to my Samsung Frame TV and it works fine. Had it for a week now. My only complaint is that I no longer can control the TV volume through the remote and have to use the Devialet app instead. The Reactors are connected with each other through an Ethernet cable.