For example:
Recently I discarded all of the Harry Potter movies that I’ve had in my collection. I had the mainline ones and two of the three Fantastic Beasts films. But, as much as I have liked the visual representation of what the films projected, I didn’t feel that they were faithful adaptations. Because they changed too much for my liking.
Instead, I prefer the books because they do have better character representation than the uneven scaling of how the characters are in the movies. That’s what I found important than anything else between book and film. If anyone were to ask me as to what exactly is the best way to get into Harry Potter, I would say the books, because they’re going to get mislead by what the movies project. Is it the best optimal experience of the universe established.
I’m not sure your example is really about curating. It sounds like you’re most concerned with whether something is a faithful adaptation, which effectively means you want to collect the original version and whatever matches it.
As for how I curate things, I mostly don’t… the closest I get is building a collection based on “what do I like/find most impactful”. Or I guess sometimes I simply discard things I’m not using. I suppose I “curated” my bookshelf by adding books I like, giving away a few that I didn’t like or thought someone else needed more, and organizing the books in a way that only makes sense to me. Which is to say, I didn’t curate it at all. True curation would probably look more like a Goodreads account with notes about why I liked the books I gave 5 stars.
edit: my understanding of real curation is that it involves placing art in context. You present it in a way that is informative and maybe inspiring. Part of it is about choosing what to include/not include in a collection/display, yes, but a lot of it is about conveying what the art is about, using the art to tell a story or peek into how a historical trend developed, etc. Choosing what to keep is only a small part of it.