Olmert tries to save face

Israel's Prime Minister (for the time being) Ehud Olmert has caved in to public pressure and has appointed Retired Judge Eliyahu Winograd to head a "governmental investigation" - and not a "state commission of inquiry" - into this summer's war in Lebanon and the management of the political echelons and the defense establishment during the war. It's not clear to me what the difference, if any, is