SpecTek is a wholly owned division of Micron, a ram OEM whose major consumer label for ram is Crucial.
I don't see a problem there, Crucial ram is basically compatible with anything. I doubt Micron would release ram that didn't hold up to its standards.
The only thing I can figure is even though Adata kept the same model number, it changed OEM supplier for that ram, prolly due to cost factors or supply issues, which there was/is a shortage of silicon ic's not too long ago.