Of course if they are not all equally easy, then some must be easier than others.
The difference is in who and how you're willing to fight in differing aircraft.
Two potent quotes on the topic above.
In the context of simply
getting kills, I think we can agree "how you're willing to fight" is sometimes greatly influenced by what you do fly. Yes, there are peeps that can turn fight low and slow in a P-47 and the like but (in this context) plane type influences flying style.
Thus, "what planes are hardest to get kills in" comes down to how you fly what you are in. To be effective requires knowing the plane very deeply of course.
Great to bounce around these topics with you guys. In a sense, I am thinking out loud with you and coming to understand ACM and the given chess pieces better.
Slade