Transition from collective creativity to creativity individual allowed to be issued to art in a special self-sufficient form of activity. And throughout all this way the new characteristics of art aspiring to a poryvaniye of communications with tradition were developed. So occurs also in the present. Unless it has "game character".
Formal differences:
The bylina and the fairy tale are genres folklore, unlike the story which is a genre actually literary. It means that neither the bylina, nor the fairy tale have no author per se. The author in this case national consciousness is considered; it is the certain generalized image of the author. The story is steadily accompanied by the author. For example, story by Chekhov "Bishop" or story by Edgar Poe "Mask of red death".
The story and the fairy tale are genres epic. The bylina, despite an epic plot, nevertheless does not lose touch with lyrics as it is presented poetically.
Time represented in the bylina, always the past. The story allows the room of a plot at any time. Fairy tale space vnevremenno, universally. Hero of the bylina athlete. But it is a generalized character, in it the shape of all people is imprinted. Heroes of the fairy tale it is also generalized characters. The lack of any exact instruction for time and the place (chronotope) of action which is described in the fairy tale can demonstrate to it. Besides, names of heroes "wander" from the fairy tale in the fairy tale, names of heroes of tales of animals are accompanied by constant epithets. That is heroes of the fairy tale are just had by national consciousness from one subject space to another. The hero of the story is unique (mainly), the episode from his concrete life becomes syuzhetoobrazuyushchy.
Substantial differences:
Contents of the bylina steadily is glorification of heroism of the people. Any episode from life of the hero or several heroes can become contents of the story. Especially household plots can be contents of the fairy tale, in other fairy tales elements of a fantasy, magic (so-called "magic fairy tales") are possible. Any given historical events and even heroes (generally it is a figure of the prince), but with the prevailing fiction share because, despite the background historical in appearance, this component of a real story of the people pereosmyslyatsya find reflection in the bylina. Here the bylina is partially crossed with the story in which the real facts can also find reflection (both modern, and remote in time) familiar to the author. For the rest the story, being a literature genre as special art form, it is fiction, other reality which is crossed, of course, with reality, but it is rather weak (otherwise the art essence as a type of activity disappears). In it it is adjoined by the fairy tale which represents irreality in pure form and which resists to the bylina allowing in itself "reality".