I was taught Pitch for airspeed and Power for ROD during my PPL.
Then I was taught Pitch for ROD and Power for Airspeed for my IR.
Then I was taught Point and Power on my instructor course.
It's amazing that I can actually land nowadays!
In my opinion they are all the same thing Power+Attitude=Performance unsurprisingly.
The only difference is :
For instrument approaches you tend to be relatively quick (front side of the power curve).
For visual approaches (especially into short fields) you tend to be relatively slow (back side of the power curve).
This just biases the effect of changing Power or Pitch on ROD and airspeed.
I have only just started instructing recently so can not really appreciate whether one technique or another helps the student learn more easily.
I will be sticking with the Pitch for airspeed at the moment though as this still works when the engine goes bang
