Hestia2 said: "What is exactly Superbia?"
Superbia is an incomplete musical written by Jonathan Larson. The project started as an adaptation of 1984, but became it's own thing after George Orwell's estate denied Larson the rights.
It's incredibly difficult to compare Superbia to Dear Evan Hansen, not because they are wildly different shows, but because Superbia, in a way, doesn't exist, and never will.
If your knowledge of the show comes from Tick Tick Boom, you might have the impression that Larson finished the show, put on a reading, and put the whole show in a drawer while he went off to work on Rent. In reality, Larson never stopped working on Superbia, and was still actively rewriting it up until he died. As a result, we have multiple drafts of the show, with different songs, plot points, themes, and characters. Someday, someone might try to cobble together a show from what we have, but without Larson to give his authoritative say as author, it will never be "Jonathan Larson's Superbia".
Dear Evan Hansen, on the other hand, is a finished show. While it's possible that there may be edits or revisions in the future, you can point to the 2016 Broadway production or the published script and call it the "definitive" version.
This wouldn't be comparing two musicals to see if they are different takes on the same ideas, it'd be comparing a musical (one whose creators are all still alive and able to discuss it's intent) with a collection of songs and a few hundred pages of script that don't have an authorial permutation.
A lot of Jonathan Larson's early work is like this, and its unfinished nature doesn't make it uninteresting. If you're interested, J. Collis has a book called Boho Days where he goes through Larson's papers at the Library of Congress and analyzes how Larson developed his style as a composer.