Oxford or Cambridge BiologistWatch
Cambridge is clearly a better university though, so...
Son loved Oxford as a place but I know it was the course that swung it. He did Research Masters at York (as 4yrs was not available at that time.) He is now doing Phd at Cambridge having got 1st at undergrad at Oxford.
So it has worked out so far for him. The only thing he does say though is that Cambridge appear to be keener on keeping people on for Phd than Oxford. He is surrounded by Cambridge graduates while none of the people expected to get Phd places in his year did not get them from Oxford. A lot of his Oxford friends seem to arrive at Cambridge in the end but they do say it is good to change it up. So in conclusion go where you like. Makes no difference.