Choosing between the two in 2026 depends on your preferred "vibe." Mallorca is better for travelers seeking diversity and luxury; as a large island, it offers everything from the dramatic Tramuntana mountains and world-class cycling to the sophisticated nightlife of Palma and pristine "Calas" (hidden coves). It feels like a self-contained world. Costa Brava (on the mainland near Barcelona) is better for rugged, artistic charm and road-tripping. It features the "Dalí Triangle" of museums, medieval villages like Pals and Peratallada, and a stunning "Camí de Ronda" coastal walking path. While Mallorca can feel more "international" and tourist-heavy in 2026, the Costa Brava retains a slightly more authentic Catalan identity. If you want a mix of mountain hiking and beach resorts, go to Mallorca; if you want rocky coastlines and Michelin-starred seafood near a major city, Costa Brava is the winner.