OK, so if I understand you correctly, in the Amazon series, the first 2 pics are release version, no mods, and the last 2 pics are latest version no mods - so comparable? This is true of the others too - so if we ignore your “with mod” pics, we can see a fair comparison. Not sure why everyone is complaining about comparisons with/without mods.
Anyway, these comparisons are really interesting. I downloaded the old v new (both without mods), and zoomed in max on them, and see the following:
Amazon (release first, current second)
I’m struggling to see a material difference here, which is interesting
New York (release first, current second)
Again nothing in it - just a slight tint in colour between the two
EDIT - looked at the LOWI ones as well
First pic is release, second is current
I see more trees here in the current version than the release version, especially up the slopes of the mountain