This pearl was in the description in the new book.
The design has been such a success for MandalMotors that the Fang is produced at several factories. Each of these plants is run by a different Mandalorian clan. and while they are not aggressive toward each other, the clans are rivals. Managers had their in-house design teams tweak the Fang's capabilities to try and one-up their peers. When this was uncovered, the board of directors ordered an end to the competition and standardized the Fang fighter's performance profile.
Edited by Raicheck