[greymule]

is there a website or a pdf that outlines the differences between OBR and ASA rules

I cannot imagine that there is any such site, but there seems to be a site for everything else, so who knows?

Actually, differences between ASA and Babe Ruth softball would get you pretty close in many areas, since Babe Ruth takes entire sections (especially regarding interference, obstruction, appeals, awards) directly from the OBR book—verbatim. For example, there are no dead ball appeals in Babe Ruth, and not only are there two types of OBS, but OBS that has no bearing on the play is not called. Good luck doing a Babe Ruth softball tournament with coaches and players accustomed to Fed and ASA.