The city with more in the second dimension, or more specifically, a higher population density, is New York City. According to the United States Census Bureau, as of 2020, New York City had a population of approximately 8.4 million people, making it the most populous city in the United States. This high population density is a result of the city's compact urban layout, which includes a significant amount of residential, commercial, and industrial space within a relatively small geographic area. In contrast, Chicago, the third-largest city in the U.S., had a population of around 2.7 million in the same year, resulting in a lower population density.

The high population density in New York City is further compounded by its unique urban design. The city's grid system, which was established in the 1800s, allows for efficient use of space, with narrow streets and tall buildings that maximize the number of people that can be accommodated within a given area. Additionally, New York City has a robust public transportation system, which includes subways, buses, and ferries, that enables a large number of residents to live in the city without the need for personal vehicles. This reliance on public transportation further contributes to the city's high population density.

Data from the U.S. Census Bureau also reveals that New York City has a higher population density than other major cities such as Los Angeles, which has a population of approximately 3.9 million and a lower population density due to its larger land area and more spread-out urban development. Similarly, Chicago, while having a higher population than Los Angeles, has a lower population density due to its larger land area and more suburban development.

In conclusion, New York City has more in the second dimension, or a higher population density, compared to Chicago. This is due to the city's compact urban layout, efficient use of space, and robust public transportation system, which all contribute to a higher population density within a relatively small geographic area.