Vector Compare 220.127.116.11 will be retired from active maintenance in 2022, but will continue to be available without improvements at National Hydrography Tools page.
Compare Tool Retirement
The Vector Compare Tool is designed for use with ArcMap 10.x and is used to compare features/rows between two feature classes/tables in two geodatabases with the same schema and spatial reference. The geodatabases can be in either personal or file geodatabase format. The tool creates a new geodatabase that displays differences in geometry and attributes.