looks trimac to me but this is true, that unless you get fish with an F number, whos lineage can be traced back to the wild, it is almost impossible to tell between the two.
This is because many corporate farms get "trimac" cichlids from a big tank that contains both "Trimacs" and low grade flowerhorns. In fact you can see this on wholesale lists, I have seen "golden trimac" come up several times from different places, and these are most assuredly flowerhorns.
This is the same problem you get distinguishing the midas or the red devil in wholesale stock.
However, if your fish does indeed have FH blood, it is probably something like 90% trimac. Whether this makes a difference to you or not would be a matter of personal taste.
Though essentially a ZZ is a "fancy trimac", just like RT are "fancy texas" just like goldfish are "fancy carp" and guppies may or may not be hybrid endlers.
The question is "do you care?"