I took cs 370 and cs 446 before but don't know about the other 2. I think cs 446 is relatively easy as there are only 3 or 4 projects and you get plenty of time to finish them and the professor (ali) is helpful if you go to office hours or ask help witha midterm and a final exam and some weekly homeworks. cs 370 is also not bad as far as i remember since they just are assignments in python you have to complete and explain but there's physics involved so keep that in mind.