Hi i take geography ocr a level and currently in year 13. Yes there is a lot of content, out of all 3 of my alevels would say this has the most by far. For starters there are 8 case studies for just one topic!!! (hazardous earth), and there is a lot of terminology in certain topics which you will need to learn (i.e. ELSS and glaciated landscapes- although your sixth form may take different parts of the course). There is also a lot of essay writing (33 markers) so taking an english alevel would be useful I guess- but it is fine if not as I don't.
I wouldn't say that the content is hard, it is just remembering everything. Perhaps in ELSS (earths life support systems) the content is a bit confusing- especially the long mark questions. But if you take biology this should help you out a bit.
I think it is kind of similar to GCSE. Especially if you take edexcel b geography currently, as you can reuse your hazardous earth case studies, learn aboutr esther boserup and karl marx, some of the processes involved (geomorphic). But the main difference, is the volume of content and the long mark questions.
WOuld definitely say that taking economics alongside geography has been sooooo useful! especially for the parts about cyclical, structural, competition, subsidies, government policies, some bits in future of food.
Hope this helps! SOrry if this sounds confusing