Benchmarked strictly across TripTiming's 5 empirical pillars: Crowds, Weather, Vibes, Prices, and Safety.
Berlin emerges as the optimal May destination with an overall TripTiming Index of 67/100 vs 54/100 for Amsterdam (+13 point advantage). Berlin experiences substantially lower visitor footfall and shorter landmark queues (heavy visitor congestion vs peak seasonal crowding in Amsterdam). Sightseeing is further aided by comfortable outdoor weather (18°C feels-like). Travelers also benefit from lower accommodation costs (~$248/night vs ~$378/night in Amsterdam, saving ~$910 over a week). While Amsterdam retains an edge in Civic Safety (76/100 vs 65/100), Berlin's commanding performance in Space & Crowds secures the overall May recommendation.