@Schlumpf Thank you for your reply. I understand what you’re saying about significant since it’s subjective. My two speakers are in the living room. I’ve been contemplating to buy a speaker to my kitchen which is approx 6-7 meters away from the living room, so not that far.
So if I understand correctly the Era 100 would be used in a different physical room, correct!?
If so I don’t think you will notice a remarkable (or maybe even any) difference. If the two Sonos One in the living room are set up as a stereo pair they will sound different as a single speaker anyway, regardless of camparing with a single Sonos One or Era 100.
If I were you, I won’t hesitate to buy an Era 100 for the kitchen.
Just one personal recommendation… Spending some more money a Sonos Play imo would be a nice option (instead of the Era 100), if there’s a need for a portable speaker that you could carry around and use also at other places.