Benchmarked strictly across TripTiming's 5 empirical pillars: Crowds, Weather, Vibes, Prices, and Safety.
Rome emerges as the optimal May destination with an overall TripTiming Index of 59/100 vs 55/100 for Paris (+4 point advantage). Rome experiences more manageable visitor density and shorter landmark queues (carrying capacity score 27/100 vs 19/100 in Paris). Sightseeing is further aided by comfortable outdoor weather (20°C feels-like). While Paris retains an edge in Price & Value (52/100 vs 40/100), Rome's commanding performance in Space & Crowds secures the overall May recommendation.