I will start by saying I am by no means an expert in any way.
The HC is quite a bit lighter than the Zaya. But the Zaya has 5 years on it.
HC- has hints of caramel while I sniff it. 3 short sniffs and the 3rd one reveals the caramel scent.
Zaya- As most of us know it has an almost overwhelming smell of sweet vanilla.
First taste
HC- Up front "bite" followed by floral goodness.
Zaya- No bite or harshness at first. then the vanilla kicks in. Very sweet.
Last taste
HC- Still harsher than the Zaya. Floral flavors following up some hints of sweetness.
Zaya- Vainlla isnt as profound as before but maybe my buds are overwhelmed.
Final thoughts
While I can see both having their place the HC7 for mixing Mojitos or Rum and coke, I find the Zaya an easier sipping rum since it is overall smoother. Amazing what 5 years will do.
Winner!
ZAYA by a hair
I will end by saying that this is what I personally taste and smell and you may have a different opinion/experience.