Problem is, the test of an airport is not how well it treats those who are able and ready to pay through the nose for good service, it's how it treats the majority who are neither.
Disagree Capot, it is both. T5 at LHR treats premium pax poorly, for example, with the 'fast track' wheeze.
The only differences I can see at ZRH are
(a) economy pax have perhaps 5-10 mins longer wait at security when busy, so total time in queue <15 mins
(b) economy pax use one boarding gate, premium pax another
Apart from that, it seems pretty much the same to me. Obviously the airlines provide lounge access for some, but that is not an airport decision.