I don't know the range of the full range receivers but I do know that it is considerably more than 200m.
Can you fly a 40 size glow plane and keep in within 200m, yes, but you are pushing the limits and one moment of disorientation and you can easily find yourself outside the range of that micro receiver.
I have personally flown to the limits of where I could see with a full range receiver without any loss of control.
On a side note. I do have a Berg 7P and to spite what the manufacturer list is as I do not consider it full range, it is a single conversion receiver and I would not even consider putting it in a glow plane.