sumdud said:Range, altitude, rate of fire.
Problem is that there is range of different AA gun designs in these calibers… Depending on design and exact caliber range, altitude and especially rate of fire can be significantly different… So your question is somewhat to general…
Here is data for probably most common 40mm gun Bofors L70: rate of fire from 240 to 330 rounds per minute (depending on version), max. range 4750m, max. altitude 4660…