I expect the A8 to be much closer with the A5.
A5 can hold its own vs many planes correctly flown,whereas A8 cant turn or pull up without losing speed faster than all fighters i've met.
Try to pull up fast in the A8 and you stall the darn thing at almost any speed, giving even low powered planes a chance to escape you pullng G's.
This doesn't happen even nearly in the A5.
Pulling up at low speed , flips it around, making a shot at it very hard , but you your lose speed incredible fast doing it, and you don't have any muscles to get away the second time con dives for you, with the acceleration, I dont find the A5 work that way.
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Best way of escaping pesky 51s in A8s is to dive it to the deck and do rolling scissor at 450-500 mph between treetops, it is not unusual to land more kills doing that that fight 1vs1 since A8 energy retention is by far the worst in the game.
All fighters and some bombers out turns you and keeps E MUCH better.
You can give some surprises if you fly with 1/2 tank and 2*20mm, since all planes you fly against regard you as manoeuvrable as a CV, but they know they also win the HO because the bullet drop of German guns, so I set my convergence to 800 when I go into mood to "do you feel lucky, punk ?" HO after countless HO's by most 51s in the area, tired of out rolling them every time.
You lose engine oil from the 1rst bullet always vs buffs so only good option is to do the high 12 attack.
The punch delivered to the buffs is very good and many times you lit up 2 planes each go spraying 20mms into their wings, and snapshots vs fighters not paying attention is, of course easy kills.