Phu Quoc in Vietnam is ideal for those seeking a quieter, more relaxed beach experience with a touch of local culture and pristine nature. Phuket in Thailand, on the other hand, offers a more vibrant atmosphere with a wide range of nightlife, activities, and well-developed tourist infrastructure. Your choice should depend on whether you prefer a tranquil escape (Phu Quoc) or a lively beach destination with plenty of entertainment options (Phuket).