Santorini is about the view: whitewashed villages perched on a volcanic caldera, blue domes and the world most famous sunsets at Oia. It is romantic, dramatic and busy in peak season.
Mykonos is about energy: a maze-like old town, glamorous beach clubs and a legendary nightlife, balanced by quiet windmills and the sacred ruins of nearby Delos.
Choose Santorini for scenery and honeymoon romance, Mykonos for beaches and buzz — or island-hop and enjoy both.