ID: 18DAF1xxh Data: 04h 41h 0Ch 70h 0Ch Aah Aah Aah
Note the PID is echoed as 0C, followed by the value 700Ch. Your example indicates 7,171 RPMs.
Using a J2534 device you'd want to know those addresses so you can setup ISO15765 flow control. The typical approach is to make an 0100 request, look at which ECU addresses respond, then setup ISO15765 flow control for each one.
software developers it doesn't matter -- the correct answer is to support both.
OBD-II diagnostics. If you're plugged into an OBD-II (J1962) connector then you're probably not dealing with J1939.