I guess it maybe more personal choice as to what you buy.
Really on 2 brands that I know of, could be a 3rd one too.
I bought H-11 head studs from Elite.
They do cost about 200 to 250 more than the ARP head studs, but the tensile strength is ever so slightly more. The ARP's are good studs tho.
I got the ARP studs, however the A-1 studs (h-11 tool steel) that elite sells are a little stronger.
I think it's just personal prefference, I've heard that the h-11 studs are also more brittle but I don't know for sure, some shops push the ARP's other push the H-11