I have tried both. I say mix them, but my fish have descided Hikari. They spit out the NLS pellets aswell as the greed Hikari Stapple pellets. Its funny how well they can tell the difference.
As for next time for me, NLS and Hikari Staple are out.
I Use 4 different types of Hikari, Wardley, Aquea cichlid sticks, tetra, and wardley. They also like abit of Omega One flakes. I also mix krill aswell as treating them with live Crickets. Going to do some ghost shrimp too. If they don't eat them atleast I will have cleaners getting the extra food.