According to this brief study, the area with highest crime frequency in the two cities are the city centres and university zones.
The datasets are provided in the week 1 of the course "Communicating Data Science Results" on Coursera. The crime records are given in two datasets respectively for Seattle and San Francisco. The crime information includes crime category, time, location and so on. The purpose of the study is to find out whether there is some pattern of the areas of higher crime occurance.
The figure below uses R to plot the crime locations on the map of Seattle. The outcome is a density map of crime cases.
The figure below uses R to plot the crime locations on the map of San Francisco. The outcome also shows the density of crime occurance over the city of San Francisco
From the two figures we can draw preliminary conclusion that the inner city area tends to have more crimes.