On many of the reproduction items the finish screams at you. One of the best examples is the MTH Ives Prosperity special that looks metallic PINK.
The vintage finishes have lead in them, which was banned somewhere in the 1960's. Lead adds a dark-earthy quality that is hard to duplicate with modern finishes. The new finishes are to bright on both the paint and plated trim.
Also Lionel and MTH have painted items in "fantasy colors" that did not exist in the prewar era, such as Girl's Train pink, Christmas colors and Lionel Orange and blue. I say to each his own. If you want a bright/shiny new 390E, then buy the reproduction. I personally prefer one with a few scratches that shows its age.