Sparks are 34% more expensive for infiltration.
This class also gains 3 points of strength, though it's not clear what that does.
Though SPARK units don't gain health from leveling, they do start with a high health pool of 12 normal HP and 5 ablative HP.
|XCOM Units in Long War 2|
|Soldiers:||Assault | Grenadier | Gunner | Ranger | Sharpshooter | Shinobi | Specialist | Technical | Psi Operative|