I have the Italian audio on the French disc (has no Italian subs, though, only French)
Kinski has been given a rather high, shrill voice. Suits the character fine, but isn't like Kinski's own voice.
Seems like Medusa used the same master as the French. Watch the second screenshot, with the people standing in the snow. I don't know what has caused this effect (looks like a net in front of the camera), but it's the same on the French disc, and it appears only in the first minutes of the movie. The AR also looks the same, 1,85:1