There are a few different piano exams students can take in Singapore. The most popular ones are the Associated Board of the Royal Schools of Music (ABRSM) exams, the Trinity Guildhall exams, the Yamaha Music Examination System (YMES), and the London College of Music exams (LCM). There is no difference between these exams, as they are all internationally recognized. However, each exam board has its specific requirements, so it is important to check with your chosen exam board before taking the exam.