1613 is interesting, problem solving oriented and pretty well assessed (with Rob in S1 anyway even though the final was tough)
1612 is 'qualitative' (that means get ready to memorise lots of words), boring, assessed stupidly ('here are 6 statements: A) 1 is correct and 5 are incorrect, B) 2 are correct and 4 are incorrect' etc) and the lecturers and tutors just reproduce the same stuff every semester. Final was doable though.
1612 is the reason I am considering other majors now. Do on exchange, get a twin to do it for you but avoid at all costs. If you are a non-finance major who wants more courses, I suspect 2624 is better and more useful (haven't done it though).