While some aspects of the Bluray's picture are better, overall it is over-sharpened and the cropping is wrong. Note that because it was converted to 3D, all the previously out-of-focus elements in the picture are often brought into focus where-ever possible so that the viewer can explore the depth of the movie. Here are some examples (bluray top, hdtv middle and z-vcd bot):

In this shot the bluray cropping is closer to the theatrical version.

But in this shot (and most others) the hdtv cropping is closer to the theatrical version.