The difference is in the course syllabus and access to labs. If you are interested in just learning about tuning your own petrol engine, say like a student formula team, then the “Student” option will be suited. Alternately if you are trying to learn how to tune petrol and diesel engines, remaps, building performance engines, building turbocharged applications etc., take up the PRO course.
You will be able to tune your own petrol / diesel engine after you complete this course. Additionally you will also be able to use the basics you have learn here to start working on Automotive Control Systems and Calibrations.