I think in many cases the het clowns have a funky or a generally cleaner pattern. I have one visual clown and 3 hets. My normal 100% het has a clean, funky pattern. Lesser 100% clown is clean, no alien heads and some dorsal striping. Then my pinstripe is only a 50% het but @ 500g he is as bright as a lemon blast while his clutch mates were all dark so I'm hoping he will prove out.
Here's a pic of my lesser het locked up with my normal het
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