I went with history in the end (though I know several people who did both geography AND history!) since I liked the history teachers' methods of teaching the content. I sat my GCSE exams in 2019 so here's my opinions of GCSE history, on the AQA exam board:
Positives:
-On AQA (I'm pretty sure its the same or similar for other exam boards) you do 4 topics, which are generally different eras or even specialist sub-topics! This means that you get the chance to read in-depth around a few areas and really understand them. You end up knowing the entire story behind events which I thought was pretty interesting.
-Because you're reading around 4 areas, at least one of them has gotta interest you, right?
-Lots of great resources online for learning content, especially BBC documentaries and movies to help you learn content, or just to watch as a bit of fun. You'll probably find that your teacher will use videos from time to time in your class- this is actually really fun!
-It's essay based and you need to know facts, but you can often form your own opinion in your answer. I think this makes it more engaging to learn about because you're not just being told what to think.
-The textbooks are pretty good in my opinion
Negatives:
-Most schools pick the 4 topics that you learn (they're different papers, so the schools can mix and match quite a bit. You'll probably find that the other schools in your town are doing different topics to you.) so you're usually stuck with what you're given. This isn't the worst thing in the world and you'll probably end up finding certain things better than you thought they'd be, but personally I think it would be better if you could choose.
- There's 4 topics and I think the GCSE content is taught over 2 years, sometimes 3. This means that if you find one topic really boring, you're stuck with it for 5-6 months and maybe more.
-It's content heavy, and you need to do a lot of revision to remember all those dates! Like seriously, there is a LOT of content so you need to be organised.
-It's an essay subject so it kinda hurts your hand when you're writing loads in the exam hahah
-Had to do a case study which was boring, but geography makes you do one or more of these, so I guess that's not really a negative?
Why I chose it over geography, and why I think it's better:
Tbh the teachers played a large part in my decision (I know they say not to do this, but my history teachers were legends and my geography teachers were kinda scary). Also I thought it'd be more interesting for me, it was a bit more creative since you can write about your own opinions and it sounded better than learning about rocks and rivers. I didn't do geography after all, so what would I know? My sister did and so did some of my friends, they enjoyed it so it's up to you. Geography seemed more science-y and I was doing separate science too so I didn't wanna overload myself. But if you look at me now, I'm doing biology, chemistry, maths A-Levels so I guess I can't really be out-scienced anymore than I already am :P
Also its definitely worth thinking about if you know what you wanna do in the future. If you want to go down an English-y/ politics/ law route then definitely consider history. If you want to do something with geography or environmental biology then consider geography. This isn't the be-all and end-all though, it just might be useful if you decided to do those subjects in your a-levels. Personally I haven't touched history for 2 years now (unless watching an episode of horrible histories counts??) and I'm applying to medicine at university, so as you can see it hasn't particularly influenced my decision that much.
PS I got an 8 in history in the end, pretty happy with it lol. Didn't revise that much until the March-April before my exams, so don't be put off by thinking you're gonna have to be a proper historian throughout cause you definitely don't!