GeoGuessr's familiar street-view format puts you among roads and buildings. EarthGuessr uses overhead satellite imagery. Before comparing scores or subscriptions, decide which view you want to reason from.
What you can inspect
At street level, readable signs and roadside details may help identify a place. From above, look for the outline of a bay, the direction of ridges, or the arrangement of fields. The image scale determines which details are available.
A method based on license plates does not transfer directly to a satellite round. Broad geographic knowledge may help in both, but a clue needs to be visible in the image before it can be useful.
Access and group play
GeoGuessr has a free-play route and paid Pro subscriptions. Check the chosen mode on its official site. EarthGuessr runs in a browser and requires sign-in for multiplayer; use the actual lobby settings when planning a group game.
This comparison is published by EarthGuessr. It does not claim independent testing of which product teaches geography better.
Try the same reasoning exercise
After a round in each game, write the clue you relied on and one alternative location you considered. Compare whether the experience you preferred involved recognising signs, reading terrain, or simply exploring a place. That gives you a concrete reason to choose.