Hi Amna, this is one of the most common decisions in Pakistan right now. The honest answer: neither is "better" — they fit different plans. If you want to study abroad later (UK, Canada, Australia) or target competitive fields like medicine/engineering with the chance of scholarships, O Levels give you an internationally recognised baseline and the grading that foreign universities already understand. If your priority is saving money, staying within Pakistan's universities, and moving into FSc or a local degree smoothly, Matric is reliable, affordable, and widely accepted.
Before deciding, do two things. First, shortlist three universities and the specific programmes you want, then read their admission pages — entry test weightings, required subjects, and whether they list O Levels alongside Matric. Second, be realistic about coaching: O Levels usually need consistent preparation, so talk to two centres about timetable, fee, and past results before committing. Your goal (abroad vs local, field of study, budget) decides the path — pick that first and the choice becomes obvious.