If you're going to be spending the next two years sitting in Geography lessons wondering "what if?" or thinking "I wish I was in a history lesson right now", then there is no point carrying on with Geography. Listen to that gut instinct, it's rarely wrong.
If you love history and enjoy the process of it, then whether it's content heavy is irrelevant, because you'll enjoy the content so it won't be a chore. Geography is pretty content heavy too and some of the assessment components can be much more time-intensive.
The best advice, which loads of schools just simply don't give, is to pick the subjects you like, not the subjects you think will get you the best grades with the least effort. Good grades will naturally follow from pursuing something you're passionate about; bad grades come from taking subjects you're not that interested in.