Hi there!
From my experience doing ABRSM piano exams all the way to grade 8, I would say that had a slight lack in variety of choices and styles, whereas I think Trinity you have more options in that regard. However, if music is something you are really wanting to pursue then I would recommend ABRSM, as although doing the theory may feel like a pain to do now, it will help you so much more than you realise in your future training and career in music. Furthermore, ABRSM you’re forced to do scales, arpeggios, sight-reading and aural tests, which again although may feel like a pain they are so useful for your general musicianship and technique. But in contrast to that, because Trinity gives you the option to do 4 pieces instead of scales and arpeggios, that does make it more accessible if you really do struggle with the more “traditional” exercises and technique.
I hope this has helped. Have a good think about it, but I’m sure that whatever decision you make will be the right one for you!
Best wishes,
Rose Warburton (she/her)
Actor-Musician, 3rd year