Original sentence: Doxbridge is also the name of a sporting event held every year, in which Durham, Oxford and Cambridge colleges compete against each other; though this is again much less famous than competitions between Oxford and Cambridge alone, such as the Boat Race.Durham is by far the youngest of the three; however, it was founded largely on the Oxbridge model, with features including colleges and Formal Hall, so often feels a closer connection to the ancient universities than to the newer "Red Brick" and "Glass Plate" universities.The term is a much less common variant on "Oxbridge", which refers to Oxford and Cambridge alone
Edited sentence: Durham does share some features with Oxford and Cambridge, such as a collegiate structure, and Formal Hall.Much more common is the word Oxbridge, which refers to the universities of Oxford and Cambridge only.The term Doxbridge is often associated with a sporting event held every year, in which Durham, Oxford and Cambridge colleges compete against each other, though notably less famous than the Oxford-Cambridge varsity matches, or the intercolegiate bumps between the cambridge colleges.The term is not commonly heard, and almost exclusively used by people associated with Durham.These have much more in common with each other than with Durham, which is the youngest of the three by more than half a millenium