The difference between at-Tawbah (repentance) & al-Istighfaar (seeking forgiveness)

The difference between at-Tawbah (repentance) & al-Istighfaar (seeking forgiveness).jpg

Seek forgiveness for Abu Huraira and his mother 

  

Which of the two are better for the servant; At-Tasbeeh or Al-Istighfaar?

 Which of the two are better for the servant; At-Tasbeeh or Al-Istighfaar?