Both involve sensitivity to another's emotions.

• Feeling the same emotion as another
  
• A woman sees a child crying and also feels sad
  

• Responding to another's emotion with no emotion or different emotion
  
• A woman sees a child crying and offers to help or feels anxious
  

• Cortical nuerons that fire the same way when one observes an action as when one makes the action
  
• May play a role in empathy
  
• "Mirroring" another's emotions