Walt pretty much nailed it. If you like glo, fly glo, if you like electric, fly electric. If you like both then you may be 'confused'. There are advantages and disadvantages to both. Your fuel energy density example is not applicable since either glo or electric has more than enough energy to accomplish what we want.

A simple search will find more threads than you will want to completely lead about 'which is better'. You'll see arguments about start up costs, per flight costs, maintenance costs, etc, etc, etc...... Happy reading

Woodie