OND and ND.. What is the difference?

Please what is the difference between OND and ND and which one is superior?
OND (Ordinary National Diploma) and ND (National Diploma) are the same. After completing a two-year Polytechnic program, students are awarded an OND, also known as ND.

Students who have earned the National Diploma have the choice to advance their education further by either enrolling in a Higher National Diploma (HND) program or pursuing a BSc course at a university.