A unique plot, interesting characters, and beautiful animation can make an anime story stand out. Also, a deep emotional connection with the audience helps.
The JJK anime is catching up to the manga. However, it's not quite at the same point. There are some arcs in the manga that haven't made it to the anime.
Overall, the JJK anime does a decent job of adapting the manga. There are some minor differences for the sake of animation and pacing, but they don't significantly deviate from the core story. Some fans might notice these changes, but they don't undermine the essence of the manga.
The Boruto anime has a complex relationship with the manga. It incorporates elements from the manga but also introduces its own arcs and developments. Sometimes it catches up and sometimes it goes in a different direction for added content.
The One Piece anime follows the manga pretty closely. However, for various reasons like pacing and production schedules, there might be some differences in the order of events or added content to extend the story on screen.