Bloom is more about walking and passively planting flowers to help your Pikmin grow. It doesn't matter much where you walk although there are some specific objects in the world you can interact with.

Go is more like you have to seek out a pokemon to catch it or go find a gym, and some Pokemon only show up in certain parts of the world. It's vastly less accessible to people than Pikmin bloom is.

Pokémon Go didn't click for me, Bloom is pretty different. Same company, though, and built on the same map. The main loop in Bloom is walk while planting flower » makes big flowers bloom » collect fruit » feed Pikmin » gather flowers petals / seeds to replant. There's also a secondary loop where you send Pikmin to fight mushrooms, and the seasonal event loops that give you rare Pikmin. But the parts where you're actively using the app are separate from the walking around parts, is the point.