Minecraft Earth is a mobile AR game, but that doesn't mean it's Pokémon Go.
Yes, it uses a mobile device. Yes, it superimposes digital objects on the physical landscape -- but that's just the definition of AR. Many stories and conversations about Minecraft Earth immediately compare it to Pokémon Go, describing it in terms of what's different or what's similar to Niantic's creature-collecting game. It'd be like contrasting The Life Aquatic with Billy Madison just because they're both shot with a camera and play out on a screen, but one happened to come out first. Pokémon Go and Minecraft Earth are vastly different experiences from the ground-up.