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This is a Gazebo plugin, and hence will work only in Gazebo (doc).
This is a ros_control
plugin, and will work with any supported robot backend, and includes not only Gazebo, but ros_control
-enabled hardware, and potentially other simulators as well (doc).
Feature-wise they seem roughly similar: take twist commands, publish odometry. I would suggest you to look at the documentation of each alternative and figure out which works best for your setup.