Oxford.
Just to clarify for a young soul who doesn't know what he is comparing now, there is no choice.
I will not speak any further about "why" because that will rather confuse you and may make you think as if there is some sort of choice to consider.
No it's not. It's Oxbridge and else.
You will figure out what I mean by yourself by the time goes.
Asking this kind of question in here already tells a lot that you rose yourself particularly well.
Good luck with your exam and summer.
Study subject you will learn each academic year during the summer, at least one the most challenging course per term.
And don't miss varsity ski trip at the first winter break.