How to Decide Between Them
Step 1: Know the career, not just the qualification.
Look up what qualification your target career actually requires before you fall in love with a course name. Nursing, teaching and accounting all have specific, non-negotiable entry qualifications.
Step 2: Be honest about how you learn.
Do you retain more from doing, or from reading and writing about it? Neither is wrong. It just points you toward a diploma or a degree.
Step 3: Check your APS against real requirements.
Compare your actual APS to the entry requirements for each option at each institution you're considering - they vary more than people expect.
Step 4: Think about time and money honestly.
A higher certificate costs less and takes a year. A degree is a bigger investment of both. Factor in digs, textbooks and transport, not just tuition.
Step 5: Ask what happens if you want to go further later.
Check the specific bridging or credit-transfer route from your chosen qualification to the next level up, at the specific institution you're applying to - it's not automatic everywhere.