Hikari I have seen/heard from many resources had changed their ingredients not too long ago claiming it's less nutritious than before.
I stick with Omega One Betta Buffet, Atison's Betta
(Pro is no longer being produced, it was one of the top choices for breeders, but the regular is also super good), New Life Spectrum Grow
... I have flakes that are created for bettas but aren't sold in stores yet - Feast Plus #2
(not quite as popular with my fish), and going to purchase this pellet food
as well when I get around to it heh..
(Yes, I spoil them when it comes to feeding them lol... should see all I have for fry/juvies!)
Overall though you can't go wrong with Omega and NLS foods when it comes to commercial betta pellets, those are a couple of the best.