The main difference between a 3- and 4-star hotel in Bremen will be the level of service and availability of creature comforts. Three-star hotels are typically lower priced and include the amenities and services you need for your comfort, such as a gym, breakfast and WiFi. You can look forward to a bit more at a 4-star hotel — think upmarket interiors, deluxe bathroom products and perks like on-site spa centers.