-
annoying
I think the Wippermann one provides flush pins but needs more bending than the KMC one you like. They're both shit - either get a spring clip to go with your bushed chain for optimum singlespeed life (which is hardly an option in 3/32" these days, the 7R8 seems to be the only one) or just accept that flush riveted bushingless dérailleur chain with it's symmetric quick links is where the market is these days.
AFAIK, that is the OE link which comes with the 7Z1, and it's the one I think is shit. Obviously your experience is different, but for my money the Snap On link is the work of the devil and should have been drowned at birth. The only advantage over a proper spring-clip link is that it is compatible with a 5-speed dérailleur, but anybody using a 7Z1 with a dérailleur is deranged anyway.