The principal difference between a 3- and 4-star hotel in Pho Si is the level of service and access to creature comforts. Three-star hotels are generally more wallet-friendly and come with the conveniences and services you need for your comfort, such as breakfast, WiFi and a gym. You can count on a little bit more at a 4-star hotel — think upscale furnishings, premium toiletries and extra touches like day spas.