I disagree.
Let's face the facts.
A higher eny plane takes longer to reach a higher alt.
A higher eny plane is slower
A higher eny plane is limited in acceleration most of the time
Givin these three discrepancies, the higher eny plane is a lot more difficult to be successful in. A big group of high eny fighters F4F, P40, 109E, P39, with the same skills match up with planes like La7s, Spit16s, P51Ds, and 190Ds will not have a chance. I don't care who you are. Planes that cannot build the E advantage during a fight are at a critical disadvantage. Secondly, a group of high skilled high eny fighters would still have a hard time against an equal number of top performing planes with people who aren't as skilled. These planes really do make a difference. You can see it in people's statistics of the way they fly. Even a fight that is unbalanced, a great fighter in a low eny plane can destroy a group of high eny fighters because they simply cannot build up the E, gain alt as quickly, run away from trouble, or catch a faster plane. The bullets are typically weaker and the faster planes can accelerate more quickly inorder to escape the fight. It makes a huge difference.
The question there is, you think that a large group of high eny fighters is more damaging. It's not. You lose planes that do not have the necessary Ord to take down bases. You lose ability to control the fight. If you are met with an opposition of spit16s and La7s, you won't last long. I can guarantee it. I've seen it happen. What people don't realize is that the # discrepancy only effects the amount of players in the game. It doesn't necessarily mean that the base you are attacking with High Eny planes, won't be opposed by the same or more fighters with spit16s ans La7s.