190d flies beautifully, the one-ping spinner-to-firewall radiator keeps me from flying it.
152 zoom and potent weapons would really be worth the ride, but only if did not share the radiator with 190d, making it too hazardous as buff killer.
A5 is the most fun of them all to fly, but slower on the deck than the the other 190s, and less armour means more Pilot wounds. No Radiator is a big plus, 7.7mm mg best used at garden parties, only 2 151 20mm.
A8 has guns to down most planes with a burst (both 4*20mm or 2*30mm) ( Yak9 is an exception), it's the hardest of them to fly, but is the most survivable 190 a-series flown correctly.
Seems to take some more hit points before things go Kaputt compared with the A5, specially from rear.
Faster on the deck than the A5 , will save you from chasing late spits.
This is my observation from how I fly these planes only.