You're welcome
Yes, I guess so - but the advantage of sociology is that you can kind of.. make it up as you go along, in a sense. Eg. If you can't remember a specific study to support whatever point you're making, just choose something you've seen on the news and link it! It's not really about facts, so there's no right or wrong answer.. In theory.
It is indeed, 2 exams per year. I couldn't tell you whether it would be similar to English, I did Sociology/Psychology/Biology/Maths
The essays can range from 18-33 marks though, with the 33 marker requiring atleast 3 pages of writing within about.. an hour and a bit?
All I can suggest is that you choose the one you'll enjoy most - you're bound to get a better grade in the one you are happiest studying. Talk to as many people as you can on here that have studied both these subjects, and maybe enquire about the specific topics you'll be studying in each subject on your exam board.