I think sometimes they disagree each other in both premise and conclusion, (different premises and lead to opposite conclusions)
and sometimes they only disagree with either premise or conclusion. (arrive at the same conclusion using different premises or using the same premise but arrive at the different conclusion)
When they have opposite conclusions and different premises, the question can really ask either about premise and concision discrepancy right?
For example, PT79S4Q20.
They disagree with both premises conclusions right?
The conclusions are implied---For Edgar, the conclusion is do NOT shutdown, but for Rafaela, DO shutdown.
Comments
In general though, yes, the disagreement can fall to any part of the argument.