My understanding is that the 2 files should be identical apart from cols 700-709.
This i smy understanding also.
just put in the 2 dataset names and go.
Yes, if positions 700-709 are excluded, the compare would work, but this requires more than only dataset names.
I won't fall on my sword over which utility might be used, but if the files are very large, the sort product will perform better than superc. . .
Have good one