Becoming attained-to-view as opposed to one liberated-by-faith and vice versa

Question

How did the practice of one in-training (sekha) differ so that he became one attained-to-view as opposed to one liberated-by-faith and vice versa?

In MN 70 the Buddha describes them like so:

And what person is attained to view? It’s a person who doesn’t have direct meditative experience of the peaceful liberations that are formless, transcending form. Nevertheless, having seen with wisdom, some of their defilements have come to an end. And they have clearly seen and clearly contemplated with wisdom the teaching and training proclaimed by the Realized One. This person is called attained to view. I say that this mendicant also still has work to do with diligence. Why is that? Thinking: ‘Hopefully this venerable will frequent appropriate lodgings, associate with good friends, and control their faculties. Then they might realize the supreme culmination of the spiritual path in this very life, and live having achieved with their own insight the goal for which gentlemen rightly go forth from the lay life to homelessness.’ Seeing this fruit of diligence for this mendicant, I say that they still have work to do with diligence. And what person is freed by faith? It’s a person who doesn’t have direct meditative experience of the peaceful liberations that are formless, transcending form. Nevertheless, having seen with wisdom, some of their defilements have come to an end. And their faith is settled, rooted, and planted in the Realized One. This person is called freed by faith. I say that this mendicant also still has work to do with diligence. Why is that? Thinking: ‘Hopefully this venerable will frequent appropriate lodgings, associate with good friends, and control their faculties. Then they might realize the supreme culmination of the spiritual path in this very life, and live having achieved with their own insight the goal for which gentlemen rightly go forth from the lay life to homelessness.’ Seeing this fruit of diligence for this mendicant, I say that they still have work to do with diligence.

Answer 1

How did the practice of one in-training (sekha) differ so that he became one attained-to-view as opposed to one liberated-by-faith and vice versa?

Likely that'd involve more than just the training but also the innate orientation of whether one is "insight oriented" or "serenity oriented" as the dominant faculty. Sorta like some folks are born naturally good at literature, while others are naturally good at math. Note that the Liberated-by-Faith/SaddhaVimutta is for those who are "serenity oriented". This stage is a notch below the Attained-to-View/DitthiPatta, who is "insight oriented". Ven. Bodhi in "Middlelength Discourses" provides footnote to those 2 terms based on Commentaries' explanation:

Attained to View/DitthiPatta(insight oriented): [705]MA: includes the same 6 individuals as under Kayasakkhin, but without possession of immaterial attainments. Pug. defines him as one who has understood the Four Noble Truths, reviewed, examined with wisdom the teachings proclaimed by the Tathagata; defilements partially abandoned without immaterial attainments;

Liberated by Faith/SaddhaVimutta(serenity oriented): [706]MA: includes the same 6. Pug. defines same way as Ditthipatta, but adds that he has not reviewed and examined the teachings with wisdom to the same extent that the Ditthipatta has; defilements partially abandoned without immaterial attainments;[ITBW_X.17]This includes the same classes in whom faith is the dominant faculty.