Neither Mykonos nor Santorini is definitively 'better'; the ideal choice depends on your travel preferences. Santorini is renowned for its dramatic volcanic caldera views, romantic ambiance, and historical sites, making it perfect for honeymooners and shorter, impactful visits. Mykonos, on the other hand, excels with its world-class beaches, energetic party atmosphere, and a more laid-back vibe for extended stays with ample opportunities for relaxation and exploration.