Actually they don't, Hyuugas waste a lot of chakra using their kaitens. If you look at it both clans are short/mid range. Only difference is if you don't have Kaiten you SUCK. Also Kaguya have mid range (sawarimi) so Boom, a Hyuuga's kaiten will be flawed if he uses it forever and a Kaguya's mid range is instant hid unless the Hyuuga's in kaiten.
grush you would be right except for 2 things, 1 nara is right, if you dont get kaiten you might as well start over and try again, 2 if hyuugas did what they were supposed to do and drain chakra, you'd be right, so far exceot yorois, clans drain chakra that ive never seen them do in the show, and the clan thats supposed to drain chakra doesnt do it well which i tihnk is hilarious
hyuugas are basically only good in the beginning against kaguyas since kaguyas dont get too many good dances and palms own when the enemy have no jutsu. kaguya whipes the floor with hyuugas after atlest dance 4 and dance 5 just owns hands down.