Are Sweet Valley High Similar to BSC?

https://preview.redd.it/emnsd530kine1.jpg?width=673&format=pjpg&auto=webp&s=86208a21cd41b058f4b97e35de9c25eabcd1c1dc

For those who don't know, Sweet Valley High is a book series written by Francine Pascal which is about two twin sisters, Jessica and Elizabeth Wakefield. Jessica is the twin who is more outgoing, popular, flirty, romantic, and free-spirited even if a bit snobby, bratty, and shallow at times, while Elizabeth is the twin who is more kind, empathetic, sensible, serious, studious, and level-headed, even if a bit quiet, shy, and sensitive at times.

These two girls go to high school with all their friends, and some of the storylines mention dark topics for personal problems like racism, drugs, and even anorexia, and some later stories, even talk about vampires and werewolves.

There are even spin-offs to the books, like Sweet Valley Twins, which is mostly focused on Jessica and Elizabeth themselves when they were in sixth grade along with the rest of their family. There's also Sweet Valley University, which is with them all grown up and going to college, and there's even Sweet Valley Kids, who has them as second graders. Heck, there's even Sweet Valley Junior High, who has them as eighth graders, and Sweet Valley Senior Year with them during their final year in high school. There's also even Unicorn Club, when Elizabeth and Jessica are hanging out with the Unicorn Club members, Lila, Maria, Evie, and Mary. (AAAAAAAHHHHHHH! HOW MANY SPIN-OFFS ARE THERE?! IS SWEET VALLEY REALLY THAT POPULAR?!)

So, does this book series ring a bell to anyone, and is it similar to BSC?