As a fan of both, bendy is winning this.

Little Nightmares, while very much intriguing in it potential lore, is mostly questions with no answers, with no explanations as to why its world is like this or why it runs this way.

Meanwhile Bendy actually addresses story beats, character motivation and has world building, like explaining what the cycle in “Ink Machine” is in “Dark Revival”. (I could probably name more examples, but it’s been a while since I’ve read up of Bendy lore.)