Compare & contrast: New York & Amsterdam

What's the difference between New York and Amsterdam? From Yahoo!'s Weekly Picks:
NYCASD
“Taking a single word as inspiration, Ron snaps a photo in Amsterdam and Jeroen does the same in New York City, creating a engaging, colorful, and diverse look at big-city life. The site is divided in half throughout, allowing you to browse the archives and look at two sides of the coin. A thoroughly enjoyable excursion that bridges the gap between two cultures, this site will encourage you to consider the simple differences in our wide world.”
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