I would agree that CTC is streaks ahead of OAT. An interesting point made by scroggs though, about the fact every wannabe will apply to CTC and not all will apply to OAT.
I agree that the standard of selection at CTC must be higher than Oxford, simply because CTC are taking the risk, whereas at OAT the student is taking it.
It is clear that CTC is the place to be so of course I will be doing every thing I can to get there, but OAT doesn't seem an awful second choice. Assuming you have the money and the luck!