Numerical value is the number of a quantity expressed in numbers, and specific numerical value is the number of a quantity expressed in specific numbers.
For example, how many people? Seven or eight. Seven or eight is the approximate number.
For how many people? Seven. These seven are specific values.
What's the temperature today? Twenty degrees. These twenty degrees are an approximate number, not a specific number.
What's the temperature today? 22 degrees Celsius. This 22 ℃ is the specific value, and 22 is the number.
