Very strange NullReference Problem

Sorry to keep asking questions but this one has me truly stumped.

I managed to get a pursuit AI function working for one of my AI's, but when I copied the portion of the script over to the other AI objects and changed the GetComponent section to look at the other AI's script to access it, I keep getting a weird NullReferenceException saying that nothing has been referenced even though all the spelling is correct and the script is attached to the AI.

Here are the code sections

EnemyAI - Working

 function Intercept()
 
 {
     var Target : Transform = target.transform;
     var rotation = transform.rotation;
     var position = transform.InverseTransformPoint(Target.position);
     var direction : float = position.x > 0 ? 0.01 : - 0.01;
     var angle = Vector3.Angle (Vector3.forward, position)* direction;
     var targetDirection = (Target.position - transform.position).normalized;
     var lookRotation = Quaternion.LookRotation (targetDirection);
     transform.rotation = Quaternion.Slerp(rotation, lookRotation, TurnSpeed * Time.deltaTime);
     transform.Rotate (0,0, -angle * Roll);
     
     
     if (Vector3.Distance(Target.position, transform.position) <= VisualRange)
     {
         transform.Translate (0, 0, AttackSpeed * Time.deltaTime);
         IsIntercepting = false;
         //Debug.Log("Visual Contact! Moving to Attack - Red Fighter");
         IsAttacking = true;
         Attack();
     }
     if (Vector3.Distance(Target.position, transform.position) <= RadarRange || Vector3.Angle(Target.position, transform.position) < 10)
     {
         var EnemySpeed = Target.GetComponent(FriendlyAI).InterceptSpeed;
         var TargetFuturePosition = Target.position + targetDirection * EnemySpeed;
         var FutureDirection : Vector3 = TargetFuturePosition - transform.position;
         transform.Translate (0, 0, InterceptSpeed * Time.deltaTime);
         var lookFutureRotation = Quaternion.LookRotation (FutureDirection);
         transform.rotation = Quaternion.Slerp(rotation, lookFutureRotation, TurnSpeed * Time.deltaTime);
         transform.Rotate (0,0, -angle * Roll);
         IsIntercepting = true;
         IsPatrolling = false;
         IsEvading = false;
         IsAttacking = false;
     }
     
     if (Vector3.Distance (Target.position, transform.position) > RadarRange)
     {
         IsIntercepting = false;
         //Debug.Log("Radar contact lost, returning to patrol - Red Fighter");
         IsPatrolling = true;
         transform.Translate (0, 0, PatrolSpeed * Time.deltaTime);
         Patrol();
     }
 }

Friendly AI - Not working

 function Intercept()
 
 {
     var Target : Transform = target.transform;
     var rotation = transform.rotation;
     var Position : Vector3 = transform.InverseTransformPoint(Target.position);
     var Direction : float = Position.x > 0 ? 0.01 : -0.01;
     var Angle = Vector3.Angle (Vector3.forward, Position) * Direction;
     var targetDirection = (Target.position - transform.position).normalized;
     var lookRotation = Quaternion.LookRotation (targetDirection);
     transform.rotation = Quaternion.Slerp(rotation, lookRotation, TurnSpeed * Time.deltaTime);
     transform.Rotate (0, 0, -Angle * Roll);
     
     if (Vector3.Distance(Target.position, transform.position) <= VisualRange)
     {
         transform.Translate (0, 0, AttackSpeed * Time.deltaTime);
         IsIntercepting = false;
         //Debug.Log("Visual Contact! Moving to Attack - Blue Fighter");
         IsAttacking = true;
         Attack();
     }
     
     if (Vector3.Distance(Target.position, transform.position) <= RadarRange || Vector3.Angle(Target.position, transform.position) < 10)
     {
         var EnemySpeed = Target.GetComponent(EnemyAI).InterceptSpeed;
         var TargetFuturePosition = Target.position + targetDirection * EnemySpeed;
         var FutureDirection : Vector3 = TargetFuturePosition - transform.position;
         transform.Translate (0, 0, InterceptSpeed * Time.deltaTime);
         var lookFutureRotation = Quaternion.LookRotation (FutureDirection);
         transform.rotation = Quaternion.Slerp(rotation, lookFutureRotation, TurnSpeed * Time.deltaTime);
         transform.Rotate (0,0, -Angle * Roll);
         IsIntercepting = true;
         IsPatrolling = false;
         IsEvading = false;
         IsAttacking = false;
     }
     
     if (Vector3.Distance (Target.position, transform.position) > RadarRange)
     {
         IsIntercepting = false;
         //Debug.Log("Radar contact lost, Returning to patrol - Blue Fighter");
         IsPatrolling = true;
         transform.Translate (0, 0, PatrolSpeed * Time.deltaTime);
         Patrol();
     }
 }

Now this is where the problem is

Enemy AI - Working

 var EnemySpeed = Target.GetComponent(FriendlyAI).InterceptSpeed;

Friendly AI - Not Working

 var EnemySpeed = Target.GetComponent(EnemyAI).InterceptSpeed;

Both InterceptSpeed are public variables, yet why does it work for one and not for the other?