I have both Ungaro III and Zino. They each serve a purpose for me, but Zino is new and still unraveling new dimensions for me.
I have to say that so far Zino's been pretty damn good. I'm thinking I may have waxed just a little hyperbolic on my review for Ungaro III:-X. Not to say Ungaro III isn't worthy of most of the hype me and others heap on it, but I should have waited and had more context before I reviewed it.
Zino has been temperamental a few times though - the patchouli with the flowers during drydown can seem really dirty on my skin. Like almost fecal. Not in the truest sense, but close enough to give me some reservations.
Being even darker than Ungaro III, Zino's a little more limited in use for me but it may end up being the better scent of the two in the long run. Who knows?
You live, you learn, then you buy another frag and start learning all over again. Just when you think you've got a bead on something...