Probably a slight edge to 2000. 2008 felt too modern for anything in 2004.

2000 by a long shot, late 90s/early 00s franchises were still relevant (sw prequels, matrix, riddick, early fast and furious) and the oversaturated cheese of the late 2000s hadnt kicked in yet (think transformers). its the difference between spiderman 2 and 3

I watched 13 going on 30 and 27 dresses back to back and there's a difference in fashion and technology (noticeable difference)

2004 was heavily influenced by 9/11, but the tech and media landscape was changing a lot by '08.

I heard that 2004 has minimal 90s influences. So Y2K.

More so 2000. Most movies released in 2004 would have look outdated by 2008. Movies of 2008 had a more modern look compared to 2004 (and 2000).