Hiashi wins.
W/ Byakugan having far greater insight then the Sharingan, its x ray vision would physically detect the location of Genjutsu.
Hinata attempt to see if Tobi had a special clone nearby, or using genjutsu projection is being imply in that fight. This statement alone shows counter to Gengetsu main arsenals[
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].
Gengetsu's real body gets exposed, since it will be hiding and will be obvious to the Byakugan, and gets killed.
If ever encounter to Joki, putting chakra inside, CQC will cancel out the water[
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] due to Juuken can destroy chakra by putting chakra into it. Clone either gets destroy all together or becomes a living dud-bomb.