VF Stozharau, help me understand

[ShVladimir]

In 2006. acquired in an elderly family picture VF Stozharova "Moonlit Night" 1972. Now I want to purchase another painting Stozharova, began to view his work and found that the work of VF Stozharova "Moonlit Night" 1971. is in the Museum of Tokyo.
Began to compare their (1972) and Tokyo (1971) found differences. My work is the conclusion of State. Museum of the Arts of Kazakhstan. Kasteev. They explained to me that this author's repetition. Ask for help from knowledgeable people.
Work oil on canvas pastoz. Size 63.5 * 109 is crumbling, cracelures across the surface.