Sure, they are taken at different times but there is more to it than that. Look closely (in the sim by flying these areas) and you can see its not just different time that is making the difference. The roads, tarmac and concrete surfaces have a distinct green tinge to them in the old textures, the colours are far more accurate in the new. There have been a lot of complaints about green roads in the sim with good reason, these new textures dont suffer from this issue at all and that makes a huge difference. And rivers not overflowing onto surrounding land, that’s another change that improves things no end.
And yes I agree clafossati, I was really pleased with what I was seeing this afternoon in Milan, it was awesome.