3 ohm vs 1.5 ohm ignition coil

Bewy said
Any ign system that uses a coil with a 3 ohm primary resistance is going to have low-ered spark energy. The GM HEI system replaced a points & bal res system in GM cars that had very similar characteristics to the Mopar points system. The HEI with it's 0.6 ohm coil produces 85% more spark energy than the points it replaced.

So I would look for a better ign system &.............Pertronix would NOT be high on my list...
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Yes, thank you, I'm aware that the GM HEI system is superior, I've seen the testing and so forth on slant six forum, great stuff. So, do you know why 3 ohms would be specified for 4 and 6 cylinders and lower resistance for v8's? That's the part I don't get. Why would one not want more spark energy on any engine configuration?