it would be nice it the oficial records for each class where published...
(maby thay are, but i ditten find them)
engien size ,Prop size ,Voltage(lipo Count 2S,3S,4S,6S), Waight
as i see it will be the factors that devides the boats. (Prop is les relevent, as it taks the right engien to pull it)
if the classe shuld resambel the Nitro classes then it would have to be Voltage and Engien