I vote OEM paint for all the previous stated reasons plus it appears to have all the original pin striping, which is often missing on repaints. The pin striping is also very neat, outside of the tight areas such as behind the BB shell. Had this been a professional repaint with pin striping, the previous owner would probably also have opted for clearcoat over the decals.

FYI, the Spumoni paint scheme goes back to at least 1987 but the OP's bicycle would appear to be late 1988 to 1990 as the palmares decal references the 1988 TdF victory and not the 1990 WC victory.