Neither one as it depends on several factors
Power
Receiver sensitivity -- Noise Figure
Altitude of the 2 units
Antennas gain
Obstructions hills mountains
Frequency

But here is how to determine line of sight
VISUAL DISTANCE. A rough rule of thumb is to take the square root of the
height in feet and that will give the miles from the antenna to the ground.
Repeat for the other antenna and add the number of miles. This can be
multiplied by about 1.2 to 1.3 for radio waves. For example if the
transmitter antenna is 625 feet high and the receiving antenna is 16 feet
high, square root of 625 = 25 miles, square root 16 = 4 miles. Add 25+4 =
29 miles for the visual distance. Then multiply this by 1.3 to get 37.7
miles of radio range. This gives the visual distance. And of course,
transmitter power and antenna gain, receiver noise figure and antenna gain
enter into it

So at ground level -- two 6 footers gives about 6 to 8 miles at best

Best you get a hold of a pair and try them out.



--
CL -- I doubt, therefore I might be !






"Pdigmking" wrote in message
...
I'm looking at two motorola GMRS radios, one claims to have to an 8 mile
range, the other a five mile range, but thier both 1 watt trancievers.
Why
would on one have more range than the other. Is this just marketting?

Paul.