fish will likely prefer pellets they have been feed in the past. ween them to eat all brands of pellets then make them decide. my fish eat NLS, Hikari and Massivore without distinction. although I prefer NLS for the nutritional makeup.
Don't forget Xtreme I have been feeding it alongside NLS to some picky (bloat prone) fish and it's been no problem. I like NLS if it's those two only to choose from. Mostly because Hikari can't be imported to Canada anymore due to the Canadian food inspection agency. . . at least so the story goes
is there a difference in the floating type pellets of NLS and the sinking? i got some large floating pellets cuz my motagunese only eats pellets that float