Although there were elements that clearly distinguished the replica from the Louvre's version, the most striking point was the fact that until the restoration of the Prado's version, no landscape background was visible.
These findings, coupled with the excellent state of preservation in regard to the Louvre's version, show the original colours of the Prado's painting and indicates what the copy must have originally looked like, as the varnish on the original has become cracked and yellowed with age.