Heritage will whack you with its siliage, but it is an authoritative, mature scent. I recall the scent having a bit of lavender and patchouli in it which I think Zino does not have. This is another one where a suit is almost required. "Liquid authority." Probably unwearable in high temperatures.
Zino is another scent which reeks authority, but in a more quiet way. If Heritage is for the CEO, Zino is for the Chairman (or the guy who whispers in the ear of the CEO). It lingers close to the skin and fits like a glove. More resinous than Heritage and doesn't have a lot of siliage. Very comfortable to wear. Closest thing to it that I can think of would be Gucci Envy or L'Occitane Vetiver but very, very, very, very much darker. I am not sure how it would behave in high temperatures, but my guess is that it might not be as bad as one would think because it is very much a basenote-oriented fragrance.
I like both and have both, but I give the edge to Zino because I find it more wearable.
If the siliage in Heritage is too much, try Lalique pour Homme AKA Lalique Lion. I have the EDT and it is very good and rather similar to Heritage.