If I were in your position I'd try an answer a few questions:
1) Which do you enjoy more?
2) What would you do with each of them in terms of long-term career plans, which one will get you to where you want to be?
3) Which are you better at?
If you can answer these it might help, the main thing is enjoyment, there's no point studying something, where it's an A-level, a BTEC or an NVQ if you don't really enjoy it, because you just won't get the work done. Hope this helps.