In a serious fight between the two, I'm convinced Hinata would emerge mortally wounded if not on the doorstep of death. Having potent chakra doesn't make you insanely powerful. She still has skills she hasn't polished nearly as much as her sister, and skills she isn't as good at in comparison to her sister.
You're high even beyond the stars.
Hinata's mastered 64 Palms, and can combine it with Twin Lion Palms, and her Taijutsu in the Last was also impressive, Hanabi has rudimentary taijutsu by comparison.
Hinata fought off puppets that blitzed Hiashi w/o her Byakugan, Hanabi got negged by one.
Hinata crossed a massive crater in a few seconds, Hanabi has no speed feats.
Hinata saved Neji from a Zetsu clone, Hanabi wasn't anywhere to be seen in the war.
Hinata's base Gentle Fist w/o TLF or Rikudo Chakra enhancments is powerful enough to leave scars on a Juubi Clone's body, Hanabi has no feats.
Hinata was called a strong Hyuga by Hiashi.
Hinata basically has a permanent Bijuu Cloak boost thanks to her Rikudo Chakra.