Yes because depending on your exam board, you'll be learning different content and the only possible thing that GCSE is the coursework because my school-based it on one of the GCSEs topic but it may not be the case for you. Don't worry because the only advantage GCSEs students have is that they have some sort of understanding of the exam techinque but you'll learn this so it'll be fine as you learn the content the same start as others and the new exam techniques.