The DVD version is 4:3, and shows more of the top and bottom of the IMAX image than the 16:9 bluray. However, the 16:9 bluray does actually show more on the sides than this version. I have upscaled the DVD to 1920x1440 with Topaz Video AI, and used Digital Anarchy's Deflicker, as there was a lot of flicker. The bluray does not have that problem.
Ben Burtt is the man.