Firstly congratulations on getting into both Universities. I am a current second year student and a student ambassador at Birmingham City University I would love for you to choose BCU as your university as it does have many great opportunities as well as being a great helpful and supportive community. However, before accepting your offer via UCAS, I would recommend going to some taster days at both Universities these allow you to get a feel of what study is like, from this you can then decide where you think you will thrive
I would also suggest creating a pros and cons list of both Universities and see which in your opinion is the best fit for you. I understand that Leeds offers a year abroad within your first year and Birmingham offers it between the second and third year, but perhaps establishing friends and a routine within the first year would be more beneficial than going abroad straightway.
Let me know if this helps
Gurpej (Student Rep)