yes Chatty, I wondered that too as I have the S which is 30 Euros more.

The S spec. Includes a frequency50 to 330 Hz but tbe P does not. Other than that they appear identical.

Except that there is a note on the first line of the Hacker spec. to say that the transmission platform and housing of the S is milled from solid in one piece improving holding force. There is nothing about that on the P spec.

Initial assesment is is that the gears and neutrals are the best I have encountered including the JRnx 8931 which are also superb servos.