It's actually quite astonishing how some UCAS references are near identical for some people. Some students at our school found errors (wrong names midway through the reference, wrong grades...) in their references hours before they were submitted - and this is to oxbridge. This just goes to show the 'nature' of our references. I go to a pretty good school in the uk
The UK 'university' application process is simpler compared to that of US ones.
In the UK, I would probably say only two things count: interviews and grades (references are pretty minor) IF this is solid then you are pretty much guaranteed oxbridge. If your grades are poor, but you do remarkably well in your interview then you have a decent chance as well. However, if your interview does not go as well as you hoped - but you have very, very good grades - then you could get rejected. This is just my opinion.
UK oxbridge weighting: interview > grades > references extra-currics are minor
For US applications, you really need to have a solid application - particularly if you are an international applicant, even more so if you are international and asian (grades).