Difference, Kong:Skull Island isn't a remake of a beloved film that many people who are going to see it grew up with. Remember when people say when certain films come out, it ruined their childhood from being so bad, its due to nostaglia which BATB has. This has no nostalgia other than Kong being a huge ape. Also Whereas the other has a higher average by .3 a higher percent of critics reviewed it positively for the same number of reviews +/- 1 or 2.
This also was expected to be bad where as BATB had the exceptations to be phemonal.