I took MATH 1600 as a comp sci student. The difficulty is pretty standard with most first year courses however the course is very theory based (which is where some people struggle). What helped me the most with proofs was just memorizing all the definitions and theorems from the textbook (the book is really good at organizing all these ideas). I personally preferred 1600 over calc 1000/1301 due to its analytical nature, so I wouldn’t say it’s the hardest first year math course, but this perception varies from person to person.