Is there a clear contradiction between 'On the other hand, the shared main entry for watershed has twenty-three words in CED but 93 in Cobuild .  And the word waterless is a main entry in Cobuild , explained in twenty words, whereas in CED it is naught but a so-called  undefined runon 'merely mentioned, but not explained explicitly, as a sub-entry at water .  So CED enters more items than Cobuild , but devotes less space to explaining them.' and 'CED has both more entries and more space directed toward explaining items.'
On the other hand, the shared main entry for watershed has twenty-three words in CED but 93 in Cobuild .  And the word waterless is a main entry in Cobuild , explained in twenty words, whereas in CED it is naught but a so-called  undefined runon 'merely mentioned, but not explained explicitly, as a sub-entry at water .  So CED enters more items than Cobuild , but devotes less space to explaining them.###CED has both more entries and more space directed toward explaining items.