Numbers represent damage per shot for Huge Plasma Accelerator, Huge Cannon and Medium Railgun, one full load of clip (90 rounds) for Medium Multi-Cannon and one full WEP capacitor energy load for Large Beam Laser.
As you can see from images then you can forget about Reinforced armor for combat ships because it's almost same as default Lightweight armor thus we all have 3 options: Military, Reactive or Mirrored.
If you know what weapons enemies have then choice is not hard - against all thermic weapons (Lasers) mirrored armor will protect 2-3 times better than any other armor, as well as mirrored armor is best armor against Railguns and Plasma Accelerators.
Against kinetic weapons (cannons) reactive armor is 2-3 times better than any other armor and military armor is good all rounder if you don't know what to expect or just simply have not enough money for reactive or mirrored ones.
Click to sort any column.
|Huge Cannon G||9||6,5||4,5||2,5||6,5|
|Med Multi-Cannon G||10||9||6||3||9|
|Large Beam Laser||22||21||17||21||7|