The officials of the Prado Museum in Madrid declare that the “Mona Lisa” copy was almost sure painted by one of Leonardo da Vinci's apprentices alongside the master himself as he did the original.
The copy is part of the Prado collection and was occasionally displayed. It has stark black background, not a landscape as the original. Tests were done and the restorers discovered that under the black background lies a Tuscan landscape very similar to the one in the original painting. Varnish has also been removed from the Mona Lisa's face, making it look brighter and younger than the face coated with cracked, darkish varnish at the Paris museum.
Another difference from the original is that the woman in the copy has eyebrows and the Mona Lisa in the real masterpiece does not.