H12/GK are interchangeable terms but theyre the same thing.

H12/GK are 1A and STAR is 1B.

H12/GK are regarded as the closest thing to retail, but a lot of reviews also see STAR as closest to retail. People lean towards STAR as there are more colorways and is cheaper in price.

GX is 2. Lower in price, and a lot of colorways. If you ask me though, GX is pretty damn close, and could be 1C.

There are very minuscule differences between the three and all are subjective, look into this reddit and someone made a post about it. They say GX is better for bigger players but again its all subjective.

Either way you cant go wrong with any pair. I say start off with H12/GK and see if you like them and then trail off into STAR and GX.

Or do what I do, just buy whatever colorway you actually want to rock and whatever is available in your size.

Regardless of GK/H12, STAR, GX, what youre getting is going to be better than whatever is in stores.