You can see that best by comparing a Bibliographic entry and a Note to that item, carefully noting the differences. The Life of xxxxx Jo hn Butler Yeats . Footnote gives the name in common order. Bibliography has no number because it is not keyed to any particular spot in your paper. Footnote indents the first line one-half inch, like a paragraph, then makes the other lines flush to the left margin.
Bibliography separates main items with a period and a space.
Footnote punctuates with a comma after the author's name, and a period at the end. Bibliography gives publication facts as one unit with period at the end, and internal punctuation of colon and comma, as shown. Footnote tucks all that into a parenthesis, internal punctuation the same. Bibliography does not give page numbers, because it is a reference to a whole work. Footnote cites pages of a particular passage in the work.