According to the article, 2033 will have differences compared to the original.
Brand new content has been added to many of the levels, and we’re not just talking new textures, either. Some levels have been expanded with new areas to explore. New day/night cycling gives everything a new light as well. Even the cutscenes and quick time events have been overhauled completely.
LL will just have visual improvements.
Curious to find out if the crashing and save deletions have been fixed for LL, because the PS3 version is plagued by them.As for the new version of Last Light, it gets all the visual upgrades that 2033 does. But don’t expect it to look markedly different from the current version.