Whether Santorini or Mykonos is "nicer" depends entirely on your travel style and preferences. Santorini is widely considered superior for its dramatic scenery, offering world-famous volcanic cliffs, whitewashed villages perched over the sea, and iconic sunsets—making it the ideal choice for couples and photographers. However, its beaches are volcanic (black/red sand) and can be less comfortable for traditional lounging. Mykonos, conversely, is the "nicer" choice for beach enthusiasts and nightlife lovers. It features classic golden sand beaches with crystal-clear waters and a high-energy party scene. In 2026, Mykonos is also noted for being slightly more walkable and family-friendly due to its flatter topography. If you want "life-changing" views and romance, pick Santorini; if you want luxury beach clubs and a vibrant social vibe, Mykonos is the clear winner.