Having done both at A level and now studying an English language degree, I am going to fight my instincts and say that for your uni choice, literature would probably be best, but it is more demanding.
I don't think I read a thing for English language, and the method of work is more scientific, in that you can follow frameworks etc, whereas with lit a lot more time goes into content,structure and flourish of the essays. Also I find in general terms of learning, lit gives you a worldwide/full scope perspective on things and lang teaches you to extract and analyse.