You basically do
libname remlib1 'path on server 1' server=server1;
libname remlib2 'path on server 2' server=server2;
after signing on to both servers.
Then you can compare a dataset in remlib1 with one in remlib2.
Or you do
signon server1
rsubmit;
signon server2;
libname remlib 'path on server2' server=server2;
proc compare ........;
signoff server2;
endrsubmit;
to run the compare on one of the servers, so at least one dataset is read locally.
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