The key difference between a 3- and 4-star hotel in Eduardo Castex is the standard of service and access to creature comforts. Three-star hotels are typically more pocket-friendly and include the services and conveniences you need to be comfy, such as breakfast, WiFi and a gym. You can count on a little more at a 4-star hotel — think upscale décor, luxury toiletries and extras like spa and wellness centers.