deciding between different Objects hitting the same collision

Essentially, the script would be:

     private void OnCollisionEnter(Collision collision)
     {
         if (gameObject.CompareTag("EnemyA")) 
         {
             if (collision.gameObject.CompareTag("ArrowA")) 
             {
                 // If arrow had tag 'ArrowA':
                 // - Kill enemy A
                 // - Destroy arrow
 
                 Die();
                 Destroy(collision.gameObject);
             }
             else if (collision.gameObject.CompareTag("ArrowB"))
             {
                 // If arrow had tag 'ArrowA':
                 // - Destroy arrow
 
                 Destroy(collision.gameObject);
             }
         }
         else if (gameObject.CompareTag("EnemyB"))
         {
             if (collision.gameObject.CompareTag("ArrowB"))
             {
                 // If arrow had tag 'ArrowB':
                 // - Kill enemy B
                 // - Destroy arrow
 
                 Die();
                 Destroy(collision.gameObject);
             }
             else if (collision.gameObject.CompareTag("ArrowA"))
             {
                 // If arrow had tag 'ArrowA':
                 // - Destroy arrow
 
                 Destroy(collision.gameObject);
             }
         }
     }
 
     private void Die()
     {
         // Destroy enemy or die idk
     }

Remember to create and assign the correct tags to the correct objects. @Fusionsmask