By how much does the most effective channel's score exceed the effective channel's score excee By how much does the most effective channel's score exceed the effective channel's score?

The most effective channel's score exceeds the effective channel's score by a certain amount, which would depend on the specific data and metrics being used to measure effectiveness. Without specific numbers or context, it is not possible to provide an exact answer to this question.

The context does not provide information about the most effective channel's score or the effective channel's score, so I cannot answer this question.