I go to Yandex for image search first, these days, especially if I want to do an image-based search. Whatever you may think of it, Yandex uses both facial ID and object recognition, and will return side-results that are both visually and semantically related to the uploaded image.

Google Images, on the other hand, seems to look for the nearest monetizable domain cued by the uploaded image, and gives you adjacent results about that. It certainly does no facial recognition, etc. (well, none that it will feed back to you in results, anyway).