I live in the US and see the same thing. When searching AM often returns nothing for restaurants/businesses that have been operating for months, or includes businesses that have been gone for months. The attached Yelp reviews often have a fraction of the number of reviews that GM has.Yep I am in Sweden, as an example I search for a store opened 4 months ago in the most busy area in the capital and Apple Maps returns nothing while Google Maps have all the information listed for the place.
Just searching for “restaurants” in both will show another problem with AM, first of all it doesn’t show all of the restaurants for some reason (even if they are in AM). But it also becomes a lot harder to find the few good ones since AM doesn’t have a review score visible for each place on the actual map.
I also really dislike the behavior you observe in the map view, where it shows you a fraction of all the restaurants unless you zoom in. Unless you are aware of this, you may avoid some parts of town when looking for food thinking there are few choices there.