At the top of each is the full frame (suitably shrunk down) used in the comparison, with a 250 pixel wide detail from the frame underneath. The left side is from the PAL DVD. The image was captured digitally from the disc, scaled up from its native 720 by 480 pixel resolution to 853 by 480 (to present in the correct aspect ratio) by the application. I then scaled it, in order for it to be comparable to the Blu-ray version, to 1,920 by 1,080 pixels.

The detail is from that last scaled version, and has not been rescaled again. The right side is from the Australian Blu-ray. This has not been scaled at all. Different applications were used to capture the two frames, so some caution should be exercised in judging colour and brightness.

I thought it would be interesting to compare the ubiquitous MGM logo. Not much more detail in the Blu-ray, but a cleaner image:

And we can see why the Blu-ray was cleaner than the DVD. The latter suffers from scads of edge enhancement. Loot at those white halos around the two in-focus characters. At small sizes, the DVD actually looks a trifle sharper than the Blu-ray, but get it up to a decent sized screen and the Blu-ray comes into its own while the DVD collapses into a pile of difficult to interpret noise: