K-S probability that the mass ration distribution of wide and close binaries derive from the same parent distribution as a function of the separation threshold. The sample is composed of systems from ONC, Tau-Aur, and Oph with primary mass range 0.15 to 3.0 M_⊙ (upper-left), systems from Oph and ONC with primary mass range 0.15 to 3.0 M_⊙ (upper-right), systems from Tau-Aur with primary mass range 0.15 to 3.0 M_⊙ (lower-left), and systems from ONC with primary mass range 0.15 to 0.8 M_⊙ (lower-right). Continuous line is for B98 tracks, dotted lines for PS99 tracks, and dashed line for S00 tracks.