I bought both mags (Australian issue 7, UK Issue 8) cost me a total of $31 AU, they both have an identical loader which appears to play a similar movie to the red PS ribbon at 45 degrees in the background, and has the demo's or movies selectable from a vertical scrolling list of floating 3d rectangles.
Some of the games appear to quit back to the Magazine loader menu after playing for example Ridge Racer, although I have not tried them all yet.
I managed to pause the Motorstorm Demo and eject the disk and put in the other demo disk before quitting, but it took me to a black screen and I had to power cycle the ps3.
The first disk has 4 demos. The second disk has 3 demos and 7 movies.
All demos were previously on the PSN, although they appear to be different in some cases, Ninja Gaiden Sigma has a intro disclaimer which I don't recall from the PSN version.