Is there, currently any difference in the income for online versus on-campus courses, and if so roughly what percentage difference?

We certainly agree. We have offered online courses for many years at the same tuition fees as in-person courses corresponding to the student’s program. The high-quality online courses our instructors develop have always been recognized as equivalent to our on-campus offerings. 
It is difficult to calculate a net revenue difference between online and in person courses, as it would depend on the course, the program or faculty it is offered by, and specific costs associated with each course (for example, software licensing, lab equipment, etc.) 

In light of the pandemic, we’re investing considerable effort and resources to build further on our expertise in online learning and develop innovative and effective alternatives to the hands-on experience students get from labs, specialized equipment and placements.