For both pictures: https://www.pinterest.com/baeyh880/paintings/
Edouard Manet's 'Portarit of Irma Brunner' and Leonardo da Vinci's 'Mona Lisa' have dissimilarities in color, gaze, and mood. To begin with, the starkest difference between these two works involves colors. Portrait of Irma Brunner was painted with pastel. Owing to this medium, the overall color feels soft and warm. The subject matter's pink blouse and red lips add piquancy and brightness to the portrait as well. On the other hand, Mona Lisa is an oil painting. Oil doesn't feel soft compared to pastel but its color gives me more realistic impression. As Mona Lisa's dress is much darker than Irma Brunner's, a solemn and enigmatic mood is also served to the painting.
Moreover, these sitters' different gazes determine the viewer's gaze. Viewers of Portrait of Irma Brunner are placed beside her. Viewers can thus notice her sharply outlined profile and the high contrast of the pink ear with the pale complexion. Antithetically, Da Vinci put viewers in front of Mona Lisa. Mona Lisa gazes at the viewers from all angles. It felt like she gives me a cryptic smile maintaining eye contact with me. Observers are now able to see the sitter's whole face and the brightly lit face is dramatically contrasted with the dark hair and the dark dress.
Finally, women in these paintings radiate different charms. Irma Brunner and Mona Lisa both embody abundant elegance but they have different moods in detail. As for Irma Brunner, the touch of red on her lips and the pink ear against the chalky white of her face arouse the overall feeling of eroticism. Mona Lisa's elegance is quite distinct from Irma Brunner's. Blurred outlines, especially of Mona Lisa's mouth and eyes, give cryptic impression to viewers. This is the main reason Mona Lisa fascinate art researchers.