[Belegorn]

I don't know. This seems it will need more looking into. What is known is that all the "Rings of Power" were forged based on some sort of design contrived by Sauron and that Sauron himself had a hand in the forging of the One and all the others, except the Three which Celebrimbor himself made. Even though Sauron had no hand in the forging of the Three it still had his imprint in design. I think therefore all of the other Rings, like the One, would have the same or similar effects on mortals, excluding the Dwarves. The Three, however, not so much but they were linked to the One based on their design so that they could all in some manner control the bearers through Sauron wielding the One. It may appear that Gandalf is contradicting himself, but he may not be, or he may be. As of now I do not think so. I think he is speaking in truth as concerning the One and all the "Rings of Power" in which Sauron had a direct hand in the making. Again with the Dwarves the design failed to implement to some degree.

"And all those rings that he governed he perverted, the more easily since he had a part in their making, and they were accursed, and they betrayed in the end all those that used them. The Dwarves indeed proved tough and hard to tame; they ill endure the domination of others, and the thoughts of their hearts are hard to fathom, nor can they be turned to shadows." [Silmarillion; Of the Rings of Power and the third Age]

Thus I disagree with the Note of Hammand and Scull.