Make sure you read that carefully. Any amendment that would "materially and adversely affect the interests of the holders of the Preferred Stock" requires approval from 2/3 of the holders.
This is precisely the kind of language that the commons don't have, which once again disproves your idea that the commons and juniors are the same.
Given what I quoted above, I don't believe you have actually read any of them. Since you keep making claims about the junior prefs, it would behoove you to read every word of those contracts before spouting off.