It should be noted that Roman history of this period is highly mythologized. Rome was sacked in 389, and it is commonly believed that most of the records from before that date were destroyed during the sack. This would make the earliest source possible come from a century after the major events, and our primary source, Livy, was using those sources three more centuries later.
Our current versions of these events are likely based on populari politician's recreation of the events, then further altered to promote the Julio-Claudian dynasty.