The Two Opposing Doctrines of Faith in Sunni Islam

I am reading an interesting paper.

Here are the two opposing doctrines of Faith in Sunni

School of Abu Hanifa and Maturidi theology (Murjiyyah)
Faith/Iman is knowledge or verbal confession. Your work/actions are excluded.

Hanbali or Ashari theology (Traditional Sunni)
Faith/Iman is the knowledge, verbal confirmation and actions.

The author of this paper (Wilferd Madelung) has analyzed the

• Hanafi Sunni-Murjiyyah point of view by reading the book K. al-'dlim wa I-mula'allim of Abu Muqatil al-Samarqandi (d. 208/823)
• And the book al-Iman whose author is the Abi 'Ubayd al-Qasim b. Sallam al-Harawi