RE: FM or PCM Whats the diff
The difference is this:
FM - is an analog signal from transmitter to receiver AND analog representation of positions of the control sticks.
PPM (and PCM) is an analog signal from transmitter to receiver AND digital representation of positions of the control sticks.
The rest in the price of the radio is add-ons (e.g. computer, memory, additional signal processing, etc.). Other things being equal PPM and PCM will allow more precise control of the model (and PCM is more precise of these two). Does this matter for you – you decide.
In my humble opinion – for beginner good computerized radio is more than enough. As you will get dipper into the hobby, especially if you go into aerobatics – you want to consider more sophisticated radio.
Just remember – they are just like cars: next year newer mode, more options, etc…
Hope this helps.