I mean that the ending of ESB is more pointedly existential than AOTC and it retains its focus on the core drama.

In ESB, Luke also has a loyalty to his friends which runs counter to his Jedi requirements which alone is capable of turning him from his path, except in ESB this problem is highlighted when he realizes that his entire reason for becoming a Jedi (his father) has been corrupted. It is so existential that Luke would rather die than choose. It doesn’t need to be a plot twist to serve this function, but it helps.

In AOTC, the big drama is how Anakin has a romantic interest which runs counter to everything the Jedi require him to be. However, the closest Anakin comes to breaking from the Jedi is after Padme falls from the ship, but he eventually relents. The struggle is never truly existential for Anakin, in that he must choose Padme’s life or the Jedi way - that happens in ROTS. While Luke throws himself to his (supposed) death to avoid this choice, for Anakin the choice is deferred and he ends up in a fight with someone he practically just met and who isn’t even directly involved in Anakin’s core drama. We could have just as easily followed the end of AOTC from Padme’s perspective trapped on that dune and nothing of the core drama would have been lost.