Why do helicopters earn twice less experience?

I’ve noticed that in realistic ground battles, where I’ve flown helicopters more often than I’ve used ground vehicles, I earn less experience. I checked the battle results and noticed that I get half as much experience for destroying vehicles in a helicopter as I do in ground vehicles. For example, for a kill in an AH-64A, I received 239 ex, whereas for a kill in an RDF, I received 448 ex. However, the vehicle stats list 719% and 754% experience, respectively. Why is that?

It turns out that using a tank to level up helicopters is much more efficient than using a helicopter itself. What’s the logic here?



They appear to have lumped helis in with fixed wing aircraft on rewards?