Pathplanner confusion

What’s the difference between Pathplabner’s FollowPathCommand and the AutoBuilder.followPath method? Both of them claim to generate a path following command.

FollowPathCommand: pathplanner.dev/api/java/com/pathplanner/lib/commands/FollowPathCommand.html

AutoBuilder.followPath: pathplanner.dev/api/java/com/pathplanner/lib/auto/AutoBuilder.html#followPath(com.pathplanner.lib.path.PathPlannerPath)