Who cares? feed your fish what you want to feed them most of the food companies use the same standard ingridients anyway, or just boast about their product with bull**** terminology.
I use Hikari and always have, never had a problem with it. I've never even heard of NLS. I have seen really beautiful fish both in person or online that have been fed crappy cheap foods or improper diets. the sad truth is if youre expecting changing food to make a massive difference then youre wrong.
"Oh look guys, since I started using NLS instead of Hikari my SYN now is coloured up and beautiful..." or maybe you just switched the foods at the time when the fish was already colouring up. seriously sometimes I question this sites usefulness.