 Also notable is the fact that the 1990 release featured almost exclusively songs by bassist and singer Peter Cetera, rather than a mix of material by all of the band's songwriters (the 1985 release has a more balanced sampling of material between each songwriter and the different time periods).By this time, the once prominent writers, Robert Lamm and James Pankow, who had composed nearly all of the material in the early days of the band, were losing ground due to the band's stylistic changes.Only two of Pankow's songs are featured on this compilation, and Lamm was credited only as a co-composer on one song.