YO,
Besod,
Sephardic Middle Eastern Jews Pronounce five different vowel sounds which is Babylonian Origin
ashkenazic non Hasidic Jews make 7 different vowel sounds which was of Galilean origin
Yemenite make six different vowel sounds which seems to have been of Judean origin
As They were by and large contemporaneous there’s no proof one is better than the other Though there is sourced basis that the Sephardic pronunciation has more flaws