i go for both. Reef depot carries Danichi.
Whereas iwarna got the faunamarin. iwarna might have danichi but i can be wrong. call them to check.
perhaps people dun really look in to researching. brine shrimp are like snacks for most of us. i still use brine shrimp as well, but only use it to get some fish to start eating.
for some reason, brine shrimp gets a fish to start eating sooner compared to mysis in my experience.
still, if you want nice color on fish, get a chiller and proper lightings. lighting do play a part as well, needs to experience it.
all the best.