A true story is the reenactment of an actual event, usually using the same names for the characters and scene is recreated accordingly. There is no dramatisation whatsoever (it’s rather impossible but minimal changes happen) and the story is well researched before being compiled.Facts and figures of a true story can be validated. They often mention the source (the author himself undergoing/undergone the event) or the biography or reports to affirm the veracity of the story.
This is seen in many documentaries and autobiographies.‘Based on a true story‘refers the recreation of a story with changes to the storyline to suit the audience’s understanding and expectations.
Often done to entertain the audience and dramatises certain events for that purpose. Moderate modification of facts is seen and these aren’t absolutely authentic but the basic storyline can be verified with an actual story. Seen in making certain films and crime/law related sitcoms.
‘Inspired from a true story‘ is the adaptation of a story in spinning a new tale altogether. Characters are usually have different names. The setting, progression and scene can sometimes be share little similarities with a true story.
The gist however may be the same. Only certain aspects of the plot would be drawn from real stories. This term is also used when stories are partially copied and duplicated from a real incident.Dramatisation and manipulation of facts is seen heavily as it is a new story