When arriving at the Zurich airport on a flight from another Schengen country, do you deplane into the departures concourse (i.e. like domestic flights in the U.S.?) I'm aware that there's not supposed to be any passport control, but I'm wondering if you would still be inside the secure airside area or not (and, thus, whether you could access airside services like restaurants or lounges before leaving the terminal.)
I remember transiting at Zurich Airport a couple of years ago (both flights on one Swiss ticket) and arriving airside, so I guess that means yes for you.
Wikipedia has some more info on the airport infrastructure. It's not super-clear but I read
Arriving Schengen and non-Schengen passengers are handled in separate areas of the Airside Center and reach the Airport Center by different routes, with non-Schengen passengers first passing through immigration controls.
as confirming the above.
Finally a trip report on Sleeping in Airports is in agreement with that.