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If the data sheet doesn't indicate that the two devices are matched then sorry, they probably are not and, you should use a matched device like the PMP5201Y that you linked. That data sheet mentions "match" 16 times and 3 times on page 1: -

![Image_alt_text](https://electrical.codidact.com/uploads/okx0pg0vbbfqlwmg31yugjukxgmg)

There are zero occurrences of the word "match" in the BC856 data sheet and, you can conclude from this that they are not specifically matched.