Light Blue The Ion blast's energy are more powerful than a laser's energy. However, it does not destroy, it disables the ships electronics so the ship will stop moving and its weapons will stop working. However, it can only disable a shielded craft. You cannot disable a Tie Fighter, Interceptor, or Bomber with an ion cannon, instead, you destroy it. The Krytos Trap a group of B-Wings successfully disables some TIE fighters, which contradicts that theory.
Ion cannons are also extremely slower than lasers.
As you already seen in The Empire Strikes Back , there are also the immensely more powerful Planetary Ion Cannons, which can disable even an Imperial-Class Star Destroyer with around only two shots. Red Concussion Missiles are fast and has a good homing capability. However, it is the weakest of all warheads. It is used mainly against speedy starfighters. The Millenium Falcon carries concussion missiles as part of its main arnament.