@ahstro @Readlebee hard to answer that question, given that we actually use both, and that both have different qualities. but has Inventaire was started by linked open data enthusiasts, Wikidata was the way to go :D some things would have been simpler if we went with OL (mostly book covers + that an entity can't change type randomly as we see with WD :p) but working with Wikidata also brings a lot of goodies ^^ (links to Wikipedia, author graphs, characters lists, etc)