Frequency response matters far more than simply the number of drivers the manufacturer has put in. The Hexa measures very differently from the Zero:
View attachment 248190
As you can see it's closer to an Etymotic ER2XR with the mids scooped out. Some say it's a cheaper Moondrop Blessing 2, but
from graphs alone it bears strong similarity to the Thieaudio Clairvoyance too.
You could just use a bit of EQ to get a rough idea what the Hexa would sound like compared to your Zero. Of course it won't sound exactly the same but if you're comparing two completely different tunings, as in this case, it can give you some idea. Try the EQ filters I've attached as a starting point.
View attachment 248226