The difficulty level of SSC CPO and SSC CGL (Combined Graduate Level) can vary depending on the individual's preparation and understanding of the subjects. Both exams are conducted by the Staff Selection Commission and have a similar pattern, but the syllabus and job roles differ. Some may find CPO harder due to the physical endurance test, while others may find CGL harder due to its broader syllabus. It's subjective and depends on individual preparation and aptitude.