As someone who took both History and Geography, I would say it is up to what you enjoy. From my experiences with OCR Geography, the course is very content heavy and relies heavily on memorising case studies and facts. The topics are extremely varied and are all very different, so there will always be something you prefer over something else. Physical geography and fieldwork in my opinion tends to be much more boring than human geography, however that's purely down to me finding the composition of rainforest soil beyond boring. History on the other hand is down to the exam board. I do Edexcel and have mixed feelings. Make sure you check with your school which topics you will do, as schools do different ones. Some have loads of resources available whilst some such as Conflict in the Middle East which less than 20 schools do have absolutely nothing online and the textbook itself has been pulled from production. History is completely essay based and involves quite a lot of detail, whilst Geography is a mixture of short answers and extended answers. Overall, you should prioritise what interests you the most! Both subjects equip you with valuable skills so don't worry on choosing one over the other.