What is the different between the UCR- Universal Crime Report and the NCVS- National Crime Victimization Survey?

The Uniform Crime Report is compiled from all U.S. police stations by the FBI, while the National Crime Victimization Survey is compiled from a phone survey. The UCR only counts reported crime, while the NCVS counts both reported and unreported. The UCR is compiled by people who are familiar with the vocabulary used to define crime, while the NCVS is compiled by people who have less knowledge of it.