I kind of regret choosing History, sort of, just because essay writing really isn't my thing - I'm planning to take mainly maths and science for my A-Levels, but content wise, I think that I myself liked History more than I would have liked Geography, since the topics are far more interesting. This does depend on your exam board, and what topics your school is covering, however, so maybe ask your school teachers about what exactly you'll be studying next, and possibly pick the one that takes your interest.
Overall, you should pick the one you enjoy the most, and the one that you'd be most willing to study for another two years (and maybe just pick the one you're better at if you enjoy both of them equally).