I'm not sure why they compared the J-Melo poll to the H!O poll. J-Melo only asked people for your top favourite member while H!O asks for your top 10, so of course the results are going to be different.
Would be interested to know what the methodology was for the other poll. It seems like that one may or may not have had a bigger sample size (depending on how scoring worked) so it's probably more representative of the international fan base than the poll on H!O.