Highway to oof

Too be fair hi see notorious B.I.G more similar to the blob from the movie of the same name and the thing from the movie of the same name

They're pretty different, esp. since highway to hell isn't a truely post-mortem stand in the first place. It activates while the user is in the process of dying, not after they've died. And since it actively effects the user, rather than just being a sentient stand that attacks whatever's in its path like B.I.G, i'd say they're pretty different (sorry i'm a fan of both stands lol)