One weird quirk I've discovered is 2-pin Swiss plugs appear to have smaller diamater pins than EU ones, which means some EU-compatiable plugs will not fit in CH

One weird quirk I've discovered is 2-pin Swiss plugs appear to have smaller diamater pins than EU ones, which means some EU-compatiable plugs will not fit in CH sockets. Apple's BRA adaptors work in CH sockets, KOR ones do not.