FYI, just updated the starter 1,4kw and re-wired to larger cords for negative and positive from battery.
Did the readings and tbh, if there is a difference it's in the 0.0x volts.
Ignition on, original wire
Battery 12.5
Coil 12.5
Cranking, original wire
Battery 10.5
Coil 10.0
Ignition on...