Nulls or Default Value - Performance question

Hi,

Is Null faster than "something" stored in a column of a database?

For example:

Table1:
Name          Age
John          25
Pepe          Null
Martha       12
Julius          Null

Table2
Name          Age
John          25
Pepe          0
Martha       12
Julius          0

In table1 i alowed Nulls, in table2 I have the default=0 when no data is present
Will table 1 be faster than table 2?

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