It depends on what version of the Hispanos are modelled. The earlier version wasn't too good, which is why the Soviets didn't acquire them and went ahead designing their own 20mm cannons. They were good for A-2-G work, but AFAIK their rate of fire was not fast enough for most air-to-air situations (same as the LW's 30mm cannons).
As for AP vs HE, APHE is probably more correct. APHE rounds penetrate, then explode. This is what the LW used for their 15,20 & 30mm cannons (amongst other types of rounds), and (AFAIK) the RAF in it's Hispanos.