IIRC the Gen3 demo video is using an ("optimized"?) image file but not text. A fair comparison should be using the same file on difference devices.
Now I see the price of the Vizplex version drop to $329. Actually the one I got has a "Sample" sticker on it (instead of "Vizplex"). Would it be a Vizplex "sample"?
Off topic: Frankly i am very tired of hearing continuous biased bashing of V3 (without trying the device in person) and the "Chinese crap" theories. Also not every reader (I for one) buys the DRM approach to ebooks.