Agreed with @happy1 , it’s going to depend on the professors and the school. A professor’s grading criteria differs greatly and particularly across subjects. Generally, courses like in law or marketing might weight participation more strongly so it will also depend on aspects not displayed in your related courses.
If I had to provide subjective feedback based on your related course performance I would, without your scale, rank them from least difficult to most difficult in the following order:
Principles of Finance
Principles of Marketing
Commercial Law
Principles of Managerial Economics
This is based on your high performance in math, management, and accounting which are generally at the intro level more based on memorization. While economics and statistics can be a little more theory based. While law and marketing require a great deal of memorization, courses in law typically emphasize a great deal of class participation, theory, and psychology as there are always multiple perspectives to a case.
First of all, what’s your major? That makes a difference as you have a natural aptitude to do well in some courses but maybe not others.
I agree with some of the others that it depends on the professor. However, if what’s in question is the ability to master the material rather than getting an A then some subjects are clearly more difficult than others.
I am mid year through my junior year and here what I can tell you from I have experienced - keep in mind math is not my strongest subject but I am a hard worker and I am willing to put in the time to master the material.
Easiest:
Both macro and micro economics. These were my blow off courses. Got solid As on both of them.
Marketing. The entire course is a joke and I largely consider it a waste of time. You will need to make sure you study as there is lots of memorization of terms. I got an A.
I never heard of managerial economics. Honestly, it doesn’t make sense since managerial accounting deals with running a company and economics, well, deals with the economics. Make sure you got the course name correct.
Accounting courses were moderately difficult but I got both As. Managerial accounting was easiest.
I am about to take principles of finance and I am told its a challenging course due to the fast pace and a heavy emphasis on math equations.
Commercial law (business law in my school) I’ve been told many time its another blow off course. So is business ethics.
The smart thing to do would be to take the more math intensive courses during normal semesters and do not take more than one at a time unless your major requires it.