My initial guess is "yes" assuming that the driver provides you with the strength of the signal. If you saw the same SSID but with two different average strength, you should be able to ignore the higher strength SSID. I can see lots of problems due to variables partially out of your control. For example, your proximity to the devices and intervening objects would change the relative strength you experience from your point of view. Depending on where you stand, you might see the lower power device as the biggest strength. Since tools like Kismit provide relative stength, the drivers must provide this information.