Choosing between Florence and Rome depends on your preference for intimacy versus grandeur. Rome is a sprawling, high-energy metropolis—the "Eternal City"—where 3,000 years of history are layered on top of each other. It is home to the Colosseum, the Vatican, and a world-class culinary scene. It is best for those who want a "big city" experience with endless landmarks. Florence, by contrast, is a compact, walkable "Renaissance museum" that feels more artistic and manageable. It is the heart of Tuscany, famous for the Duomo, the Uffizi Gallery, and world-renowned leather goods. Florence is often preferred by travelers who enjoy a slower pace, romantic strolls across the Ponte Vecchio, and easier access to the countryside. Ultimately, most first-time visitors try to see both via a 90-minute high-speed train, but if you only have three days, choose Rome for sheer historical scale or Florence for a concentrated dose of art, beauty, and refined Italian charm.