"Shade of Difference" is a progressive rock band known for their complex compositions and distinctive blend of heavy rock, classical, and jazz elements. The band was formed in the late 1980s by notable members Adrian Harrison and James Leighton, both renowned for their virtuosic guitar and keyboard playing respectively. Their 1992 album "Transitional Phase" is often hailed as a landmark in progressive rock, showcasing their innovative use of irregular time signatures and intricate instrumental arrangements. Despite their relatively short career, "Shade of Difference" has left an indelible mark on the genre and continues to influence progressive rock bands today.