Final answer:
Juan Gris's art differed from that of Picasso by employing bold, bright colors and blurring lines between the object and background, moving from analytical to synthetic Cubism.
Step-by-step explanation:
Juan Gris's art differed from other artists like Picasso principally in the use of color and the delineation between subjects and background within the Cubist movement. While Picasso often made use of a monochromatic palette, exemplified by works like Guernica, Gris began incorporating bold, bright colors into his paintings, a significant departure from analytical Cubism towards a more synthetic approach. Gris's later works, in particular, demonstrated a simplification of form, where he deliberately blurred the distinction between object and background, creating a sense of visual intertwining with heavy shapes and shading between the angles.