DGPS is the winner for application. Zaino has more slickness. Zaino has more intense water beading action, but DGPS is damn decent, as well. Zaino is a brighter, more shiny-looking shine with more intense reflections. DGPS has a darker, deeper, swirl-hiding shine that tries to look like a good carnauba wax. Looks are purely subjective so I will leave it at that.
I have been using the Zaino line for several years now and some of their products will always have a place on my detailing shelf, mainly Z-AIO, Z-CS, and the Z-6 Quick Detailer. Call me a traitor, but I LOVE to setup a coat of Z-AIO as a durable base and to clean up old paint protection, and then apply a coat of Wolfgang DGPS. Yes, it's kind of an expensive way to go, but it makes for an excellent winter weather combination.