So proc compare produce few reports.
Using , for example, novalues option we can exclude reports with data comparing results for fields with different values...
So I need to exclude also report with observations summary (it goes third after report with title:"listing of common variables with different attributes").
So in the end I need only first two sub-reports, from all reports which can generate proc compare.
example of proc compare which return first three reports:
proc compare base=dset1