I chose triple science and I’ve loved it. Teachers seem to focus more on pushing your grades with triple students gaining 7+ in mocks and top set combined science barely averaging a 4. Obviously this varies by school, but it’s definitely worth it. There’s only a few things extra that you learn at the end of each model, like for biology at the end of B5 you study the brain and for physics at the end of P6 you study gas pressure, but all in all it isn’t really much harder. Also Many combined science students (especially AQA) find that they sometimes put some “triple science” content in there, which makes it better doing the harder paper that you can prepare for. All in all I’d recommend it, especially if you want to go into a science career path and take science a levels!