Back again, Lower is higher also??

[newhit]

I've been browsing around the market for a high end PSU, 750-1000W. I've checked a few schematics of various PSU's and it seems that quite a few are the same for different models. Tagan 900/1100, Etasis 750/850, Enermax 850/1000, Xclio 850/1000. I think Silverstone have something similar with the Strider 850/1000. I realize that I do not have access to full cct diagrams to prove or disprove what I'm guessing at here and probably could not decipher the differences anyway if I had the diagrams but is there some devious plot manifesting itself around the manufacturers to get extra cash out of us by just putting a bit extra on the labels that cannot be disputed and so can be marketed legitimately.............errr, allegedly .

I am not making any accusations here, just querying the similarities that appear at first glance.