Which isnt true since signals are encoded differently and have to be converted anyways.
Frequently, a signal has to be converted from a digital to analog signal then back to digital. With HDMI, the signal arrives to the display uncompressed and in a pure digital state.
Either way different Tvs will produce differenct results. On some tvs you might find to be better at everyone and on another find that the statement above it true.
that your DVD player looks better through its DVI or HDMI output, while your satellite or cable box looks better through its component output, on the same display