Generally, I'd expect a board of inquiry to take a broader view than a coroner.
While the inquest is non-adversarial, in that the Coroner questions witnesses, and there is no cross examination, there are still often going to be profoundly different views amongst the interested parties.
Awblain; Clearly, you were not at the Nimrod inquest. Andrew Walker (Coroner) exposed the limitations of the BOI, and effectively overturned the findings with regards to fuel source. Evidence was given on oath, all interested parties were legally represented, and there was cross examination. In this case the BOI report was placed in the public domain some six months before the inquest.
DV