As said about the differences, the reason people swap the wires is that the PF01 and the PF09 outputs are reversed (I.E 5V at no throttle with a decreasing value according depending how far the throttle is opened) PF01 is also contains a switch as it is open circuit with no throttle IIRC. L8 expects to see the reverse of the above.

Stu out of interests what are the other differences between the two looms then?

Martin