In Workflow you are able to search based on an entry ID and it will show you the various instances of workflows that the entry id was part of. It will tell you the instance name, starting name, entry id, start time, time of last action, duration, workflow name, workflow version, workflow rule, started by and more.
In Audit Trail you are able to see all the actions that were taken against an entry within a repository.
It would be great if in Audit Trail you could see information regarding when a workflow started for the specific entry as well as the last time of action, started by, workflow name, and workflow rule (if not more). This would give a more complete picture of the lifecycle of the entry and allow for it to be viewed in a single location.
As a bonus, if Audit Trail included a link for you to click that would take you to the Workflow Web so you could view the instance details, that would be amazing!