Pretty much the bottom line is : all brands of salt are good.
Some people have favourites... just because, experience. Some people hate certain brands... just because, experience. There is no correct answer, or wrong answer. Just pick one.
Some mix dirty.
Some mix clean.
Some are cheaper.
Some are expensive.
Some have low values.
Some have high values.
I've seen amazing tanks on cheap salt...
and I've seen crappy tanks on expensive salt.
Either way, corals need
consistent levels of Alk, Cal, and Mg. So no matter which salt you choose, you will need to dose, or do frequent water changes.
Best you can do is find a brand that mixes closest to the values
YOU want to maintain and is affordable for
YOU.
Here is a database I started.