What is the difference between robot control and “general” control ?

If a control algorithm uses some features which are specific to robots, that algorithm belongs to robot control algorithms. If someone comes up with his/her own control algorithm and uses the dynamic models of robots for testing the algorithm, it can be classified to “general” control algorithm.

Here is a very simple rule:  If some people publishs their papers in control journals, they are control people and their papers deals with general control algorithms. If you find some papers in robotics journals, they are robot-specific control algorithms.  

With real robots, general control algorithms cannot beat robot-specific control algorithms.