The spreadsheet allows multiple resources to be specified on both request and response, but has no place to capture the profile associated with either request or response. It also allows capturing both a description and notes. On the other hand, Conformance.messaging.event has 1..1 focus instead of 1..*, identifies no information about the focus for response resources and requires profiles for both request and response. It also only has a slot for documentation with no ability to differentiate description from notes.