https://www.zerohedge.com/news/2019-04-30/about-letter-mueller-wrote-barr
So if Mueller thought Barr's memo was not inaccurate, and his ire was instead targeted at the media for "misinterpreting the investigation" - although it remains unclear just how they did this, after all Mueller does not dispute that there was no collusion (yes, Russiagaters, that means you) and did not dispute Barr's conclusion of no obstruction - then what is the point of these two rather confused pieces? Well, as noted above, tomorrow Barr is scheduled to testify on Wednesday before the Senate Judiciary Committee about the investigation, and the entire article is meant to focus on the headlines of the WaPo (and NYT) article, and certainly not on paragraph 13 which, not only refutes the prevailing tone that Barr did something wrong, but in fact exonerates him. But that won't have any impact on tomorrow's hearing which is now assured to be a complete kangaroo court.
As for tonight's really big, if unspoken, story - if this is the best leak Mueller has to defy Barr and the president, then Trump has indeed won.