They are both good. It depends on their application. Is this hanging art to be viewed in a room, or computer art for on screen viewing? Magazine art or what have you. It is complete when you the artist is finished it. If it were a commission piece the decision would likely be easier to make. Highlight the breast area as on the right or simply present it tastefully without fanfare as on the left. Both are well done and applicable as nice artworks. The art is done when you feel finished. You can present them in different places in different ways. Change the file name accordingly. Just my take on this. Nice gallery by the way. Good to be versatile.