https://www.thestudentroom.co.uk/university/oxbridge/oxford-demystified-should-i-applyHi Spchee,
Both my sons went to Oxford, and I have written a book about it, which I have had published in the Hive. The above chapter is about whether you should apply. Hope this helps.
I have a saying, "the course is king". If the course in Birmingham suits your need better, go to Birmingham. Why are you receiving payment and which course are you considering? I would be interested to know.
To answer your query about whether Oxford is worth it, I refer back to the 700th anniversary of Exeter college. As a current student's mother, I attended some meetings. There was a Q and A, with alumni speaking to a panel of students. The students were moaning about the price of the accommodation, however the alumni told them it was best to see the bigger picture. Most of the alumni had their own businesses. There were also some lawyers and even a High Court judge, who had flown all the way from Australia specially.
The lawyer said you can see the Oxford difference in your pay packet. A chemist (who owned his own flourishing business) said that he made a point of hiring two graduates from Exeter College every year. The judge said that Oxford is no longer the "open sesame" it used to be, but it still stood for something.
One of the panel of students (he was American, part of the exchange programme between Williams College in the States and Exeter college) told us that one of his Williams pals was only part way through his year at Oxford, when he had to leave. He was given an "opportunity he couldn't refuse" from Morgan Stanley.
You could still become great and successful at, and after Birmingham. That's up to you, and the type of person you are.
Sorry if I sound Oxford biased, however these are real examples I thought it might be useful to share.