{ 1 } - that the former presupposes the latter.
{ 2 } - that the former is a total life-response while the latter is an intellectual belief.
{ 3 } - both of the above.
{ 4 } - none of the above; he sees the two as the same.

Believing in God means trusting him, accepting him, committing one's life to him. The world looks different to a believer. For example, the believer sees the mountains and forests, friends and family, and love in all its manifestations as gifts from God.

While this is much more than just accepting the proposition "God exists," it does involve accepting that proposition. One can't sensibly praise and thank God for creating the mountains without believing that there is such a person to be thanked.