This is just my own opinion but KO seems to be the only company that has a truly low latency 2.4 gig system. Futaba might be as fast but I will never know because I refuse to use their radios, I have had too many issues with them in the past. My preference is an FM M11. I just feel more in control of the car.

Now the average driver isn't going to tell any performance difference with any of the better radios but if you are a near pro level driver running something like 1/12th mod or 1/8th onroad, the differences are significant. Lower latency = more consistent and fewer mistakes.