I don't know because there are too many variables. I don't even own a P3S which is stock 1000 meters. I have a fully modded P2V which is stock 500 meters and I've flown it just under 17000 feet distance through trees (trees start blocking at 9000 feet distance). This is with the ITELITE and Maxxrange on control, and bird side array (panel) antenna. And amps. If I could fly higher I'd get clear LOS and I'd go further but I'm limited to 400' AGL ceiling.
See this thread for how to get best distance with a P3S:
This is gonna be fun! (Distance tests)
Here is DB killing the world record on the P2V (I believe he used a CP antenna though):
http://www.flytrex.com/challenges/distance/phantom-2-vision/
Point is, if you own a 1995 Camaro, and your buddy owns a 1972 Volkswagon bug, and he's beating you, your setup has a fundamental flaw.