It is quiet convenient to combine the two. You are able to export your wallabag list via RSS and import it on a schedule in archivebox.

Thanks for sharing LinkAce! Maintainer here. If you or others have any questions, feel free to ask.

What makes it better?

I think it's primarily personal preference of features and how things are stored and presented. While Wallabag is more a Pocket/Read It Later alternative, LinkAce does not save the website itself, but a reference to it including the taxonomy you assign to it. It is intended to be a long-term bookmark archive, but without handling all the website archiving on its own.

Wallabag only stores links. ArchiveBox archives a snapshot of the actual content of a page at a specific point in time.

Wallabag extracts the content and stores it. Not just the links.

Didn't know that. Thanks for clarifying.