The big difference between a 3- and 4-star hotel in Merchingen will be the level of service and availability of creature comforts. Three-star hotels are typically more economical and come with the services and amenities you need to be comfy, such as breakfast, a gym and WiFi. You can expect a bit more at a 4-star hotel — think upmarket décor, luxury bathroom products and perks like on-site day spas.