As the other local island, Cozumel rivals Isla Mujeres in terms of its convenience and relaxed vibe. But it’s a much larger island, which means that getting around by car is advisable. Cozumel has less of a local feel and is more commercialized, which means great access to American brands like Starbucks.
If however, you are going on vacation to escape the States, we recommend Isla Mujeres for a better experience.