To my eye, the Italian piece they are showing, and those I am familiar with, is a more translucent glass, where yours and the Beranek are quite a bit more opaque. Additionally, the surface of the Italian piece appears to be quite a bit glossier, which I would associate with Italian glass, and the surface of yours, at least in the images, appears to be a little "flatter" or more satin like in the manner of a Beranek finish. Yours also appears, in the images, to have quite a bit more surface irregularity than I associate with Italian Puleguso.
The tadpoles also do not strike me as particularly Italian....
White Beranek can be tough to find images of, although they are out there. It can be tough from pictures, but I still lean towards Beranek.
If a mod moves this to Glass, we may get some other input.....
Craig