When it comes to Goth characters in fiction, there's a difference between them as written by people who're sincerely into this sort of thing and those who are outsiders, despite being informed about it the latter remain outside of the Goth subculture. Something like Cold Hard Teeth is written by someone who's actually into Goth music themselves, especially bands like Bauhaus (a seminal post-punk band), whereas something like the Spinsterella series is written by somebody who knows something about Goth but isn't sincerely into it.
As in from what I recall reading whatever story the character of Matilda Crowley appears in, she doesn't seem to socialise much with other Goths, let alone a male Goth that she becomes the girlfriend of one of the author's self-inserts. Basically and practically a glorified sex fantasy, instead of being a character genuinely rooted in someone's love for Goth music. Cold Hard Teeth differs from the Matilda Crowley stories in that the Goth characters do socialise with one another, none of them come off as sexual fantasies about Goths the way the Matilda Crowley stories do.
Like I said before about the former's author being into Goth-punk bands like Bauhaus that it makes the namesake duo's makeover as a Goth punk band all the more poignant and meaningful, since they started out as a pop music duo called Quiet Dream. I really don't get the impression that Crowley's own author is actually into any Goth band beyond mere appreciation, he seems to like hip hop much more. Not that there's anything wrong with hip hop music, but it does speak volumes about what he's actually passionate about.
He seems far more passionate about superheroes and professional wrestling than they are, which is reflected in the way he writes stories. He even sets up a shared universe not unlike Marvel and DC, which means their influence on him is far bigger and deeper than he realises or something. Cold Hard Teeth's own author is barely into this sort of thing, well not to the same extent as he does which is saying. They may have mentioned a Marvel character like Wolverine in passing, but it's not something that deeply fascinates them.
Superheroes aren't really their thing that much, so that's why Cold Hard Teeth's written the way it is. They're not too particularly beholden to both DC and Marvel, so they don't go out of their way to creating a shared universe a lot. Cold Hard Teeth's better off for it, because it would be really boring if it was more superhero-inspired. The DC and Marvel school of writing might not suit it that well, so it's better off doing its own thing: having musicians realise that they're folkloric monsters.
So there is a gulf between Goth characters written by somebody who's really into this sort of thing and Goth characters written by outsiders, this is the difference between the Cold Hard Teeth duo and almost any Goth character DC and Marvel have. Characters like Nico Minoru sometimes plays into Goth stereotypes, especially when it comes to the self-cutting part to activate her powers or something. It's kind of weird to think that I'm not that depressed as often as my two relatives are, despite the latter being not into Goth punk bands themselves.
But this goes to show you that the Goth sensibility is something else altogether, it's something outsiders don't immediately get. Cold Hard Teeth's characters are legitimately Goth because its author's really into Goth-punk music themself, the same can't be said of Matilda Crowley who seems like her author's idea of a Goth girlfriend no matter how well-informed he is about it as a subculture. So there is a legitimate difference between something made by a Goth and something not made by a Goth, however subtle it may be to outsiders.