IC airplanes varies their total weight in flight, electrics do not.

IC airplanes might have the CG changed during flight, electrics do not.

Electric airplanes do not have the same power curve through the elapsed time, IC airplanes do .

But battery weight is reducing and power is increasing where the IC engines are being limited by weight and size in order to increase power. Advantage to electric for the future to come.

This is the points I see when read about all this discussions, and think, most people do think about the variables to make a fair rule, maybe , this is what the rule makers looks at.

On the next WC I'll ask Bob Skinner and see what he says, then comment here, he is a very nice person who really enjoy talking about this as much as we all do.

Regards

Alejandro P.