In 2SD1047 NPN transistor datasheet described the application for power supplies and the description is:
The device is a NPN transistor manufactured using new BiT-LA (Bipolar transistor for linear amplifier) technology. The resulting transistor shows good gain linearity behavior.
How do we know which transistors used the "BiT-LA technology"? is it described somewhere in the datasheet?
Does it really make a difference between this transistor and for example a general purpose transistor like 2N3055 (I know the packages are different but what about the performance)?
Which specifications makes a transistor ideal for using it as main voltage regulating transistor in power supplies?