The original Splinter Cell was developed by Ubisoft Montreal and was released in 2002 for PS2, XBOX and GameCube. In these beta screens we can see a slightly different HUD and many changes in the layout of the level. There are smaller differences from lighting cues, to even full room reconstructions between versions. Even is shown, an Xbox version of what was presumed to be a PlayStation 2 exclusive level, the Nuclear Power Plant mission.
There’s also a comparison from a PS2 trailer that used a beta build of the game for display, as well as a smaller technical run-through showing the differences between the final and demo of the Chinese Embassy Return mission that was given to PlayStation magazines for use of a playable demo and game sites for personal overview. Unfortunately, the particular video had to be comprised of the near full walk-through videos of the demo run on GameSpot, so a more comprehensive comparison cannot be fully realized as of now. If someone else is interested and actually has the Official PlayStation Magazine demo, feel free to contribute a more elaborate hand-on recorded comparison video to Unseen64.net for more various differences.
Thanks to Silenceofthehills for the videos below, chek them to see all the differences in the beta version!
Thanks to D-vide for these images!