In the article linked to in the OP, on the 4th paragraph from the bottom, +Vigano writes:
"Fifty years ago, in that same palace of the holy office, Archbishop Marcel Lefebvre was summoned and accused of schism for rejecting Vatican ll. His defense is mine; his words are mine."
Actually, Archbishop Lefebvre, when summoned to the Holy Office, maintained his loyalty to the Pope in his defense. He did so again in written communications. So, Vigano's defense is not the same as Archbishop Lefebvre.