There are lots of advantages and disadvantages of studying the IB. However, it does depend on a few factors.
It’s important to understand firstly that all curriculums are different rather than hard or more difficult.
It is also very hard to compare different curriculums as they all offer different things.

There is no denying IB programme is rigorous. It involves a lot of independent study, good organisational skills and time management. However, part of doing the programme is developing these skills. It helps build what is called the Independent Learner Profile.
You take 6 subjects (from different subject groups), and have 3 core requirements, that you have to complete concurrently. The three core requirements are Theory of Knowledge, Extended Essay, and Creativity, Action and Service. These go for the length of the programme and are very unique to the programme, for example CAS embraces your extra curricular activities outside your academics, making them count for the diploma!
The IB Diploma is recognised world wide at leading universities and they value the skills instilled immensely.