Both advice could be true Dave based on coil used. The primary resistance mentioned relates to the voltage at which the ignition coil is designed to work continuously with full battery volts, which could be anywhere between 12.2 and 14.5 volts dependant on battery state of charge, though usually closer to latter.
A coil with lower than 1.4Ω one can assume is designed to work with ballast resistor to drop to its lower continuous design voltage, except when starting of course when it's out of circuit.
If you've found a combo that works though obviously stick with it.
