I am doing history and not geography for my gcses. Although I think geography was definitely easier in year 9 and I actually did better in that end of year than history (oops!!). However, history for me, despite being harder, is a lot more interesting and I much prefer learning about historical events and interpretations than rocks. Geography is basically an easier science whereas history is a self standing subject that is useful as it is an essay based subject (these are needed to go into quite a few jobs) so it keeps your options open. I knew I would be happier working towards a better grade in history and as for it being boring, it depends on your course, so take a look at the syllabus. Also, I promise the essay writing becomes easier as it can be boiled down to a formula for most question types.
I would go for which ever one you'd personally be interested in learning and gives you a variety with other subjects you are doing - good luck choosing!!