The 8002B and 8002 power amplifier chips are not identical. Although they are both power amplifier chips, the 8002B is a specific model, while the 8002 is a series model. The 8002B is a specific model in the 8002 series that may have some different features or functions in some ways. Therefore, while they may have some things in common, they cannot simply be considered exactly the same.
The 8002b and 8002 power amplifier chips are basically the same and are interchangeable