The A8 does have better dive-acceleration in this release than the A20, but can not turn or zoom with it even with bombs both at 250mph, climb and come back on-top of the A20 is the best choice.
If I where the A20 I would wish for better armour protection for the crew, all front guns 20mm's, and the same command view as the tanks have, and be able to turn with the whole wing of 3 planes in a Luft-berry circle like the 110s did against spits.
If I where in the A8 I would wish for be able to take the 13mm's out of the plane, equip it with Rm4 rockets, or 6*20mm, and be able to pull stick so i can follow a bomb-equipped A20 in a loop.
I would like to know what limitations the A20 had IRL, with and without bombs, and if inverted flight/loops where possible with bombs.