CTC's entry standards are higher than Oxford's? Not surprising really, as anyone with the right amount of money can get a place at Oxford. This is not a criticism of OAT; they are a commercial school that sells speculative training to potential pilots; CTC is a commercial pilot provider that sells baby pilots to the airlines, and charges both the airlines and the baby pilots for the privilege
If a self-sponsoring Oxford student fails, only that student is out of pocket. If a CTC student fails, the student and CTC are out of pocket, and the customer airline's plans are screwed up. That's why CTC must select their students to minimise the risk of failure, and why Oxford are very happy to take those who didn't quite make it.
Scroggs