What is the real Mona Lisa by Leonardo da Vinci?

For those who do not know;

" The Mona Lisa is a half-length portrait of a woman by the Italian artist Leonardo da Vinci , which has been hailed as" the best known, visited, written and parodied work of art in the world. "

My opinion:

Between Louvre and Prado: I think that Leonardo drew both models but left his apprentice continue Prado while he concentrated on finishing the Louvre. For both works he used much mathematics as usual and why Mona Lisas both look exactly the same, with the same proportions. It is possible that this genius decided to grow old model due to perfectionism that always characterized him. And it is said that the Mona Lisa Louvre Leonardo remained in power until his death, and even in his last days of life he inched perfecting.

Between Louvre and Mona Lisa Foundation: I think the Mona Lisa Foundation may have been copied by someone else exactly like either of his own time but not seeing the same model but a finished work of Leonardo. Of course, that other artist he wanted to give a more youthful touch to his work. Then some credit must be given to this release and that based on all studies on it are still testing still some details that make us question the authorship of the work. To my mind of all 3 versions above, the box Louvre is a true work of art. A job that I still admire for its beauty, style, and mystery. Be that in the future more versions appear, for my only be one and that's the Mona Lisa or Gioconda always Museum of Art Louvre. What work should be considered most perfect and most valued, that would be the sight and taste of each spectator.