hello! i would advise you look at the spec of both the subjects and see what you would find easier. Personally, I took geo last year (edexcel) and it was basically self study and although resources on it were very limited, the textbook was useful and the past papers were pretty much similar for each year, so it is a study that can be self taught IF you have the right resources for it. I take socio this year for a level (cie) and resources i would say are very little, if my teacher wasnt there to expand on everything in the book, id be stuck. So id suggest looking at past papers, specifications as well as exam boundaries and the average amount of ppl who get 9s to see which subject is easier for the general student.