Gasp! But I know where you are coming from. I think I might have compared the two at one time as well.
I think they are both dark, rich scents. Zino is more like a glove on my skin, thick and resinous. In a weird way, the closest scent I have resembling it is L'Occitane Vetyver, which is hardly a dark scent ... but it has a certain attractive yuckyness in its top notes that Zino has.
I agree that Heritage is a very classy scent. But it has so much siliage that it can be too much. When I think of an elegant patchouli, this is it. Zino, I find doesn't have as much vanilla as Heritage, but maybe my sniffer is off. Heritage has a touch of the ol' lavender which I don't think Zino has.
I really like both. Still, I don't find myself turning to Heritage but to its more wearable clone, Lalique pour Homme EDT!
I'd like to see how a scent which really sticks close to the skin like Zino works in this hot weather.