The 2024 version is much darker than the 1990 original. This can be credited to the fact that 1990 version involved a group of kids from the 60s, and this version involves a group of kids from the 80s. Kids from the 60s are typically labeled as good kids. The 80s era of children are labeled as rebellious.
The original, while cheesy in some aspects, has the whole story. It shows the Losers club start the story and finish it, while the remake only covers half of it. But, the remake is way scarier than the original one.