I'm studying both and I love English Literature but the exams can be quite challenging. First year was great because we studied Gatsby which I loved and the coursework wasn't too bad. The lessons are a lot of fun. Second year has Shakespeare and poetry dating back to the 1700's maybe 100 years earlier I'm not sure. It's a lot harder but still enjoyable if you can crack on.
English Language was so fascinating first year to me, if you love studying grammar and Child Language Acquisition. I'm on an AQA spec by the way, yours might be different. Second year is really cool too, you learn how English was formed and how it changes and varies. If you enjoy complex analysis then it's great.
They're both great but it depends on the type of person you are. A more creative person would go for Literature whereas someone who enjoys theoretical debate would go for Language. English Language has a better pass rate of people I know but it has a lot more to revise for exams where as English is just knowing how to interpret texts and look for meaning.