I looked through and analysize the pieces for Trinity and ABRSM. They are of similar standards and require similar technical skills at different levels. Trinity tends to have more interesting pieces to choose from. Exam dates is another concern for some parents as ABRSM exam is held in the midst of school term, where Trinity is usually during holiday period. Registration for Trinity takes place usually around 3-4 months before exam, but ABRSM takes place around 5-6 months before exam.


Hope this helps.