To compare the related work items between the current release and a previous release I can use the following:
Is there possible to create a query to get the same work items between two releases? Or alternatively the VSTS Rest API.
My reason for this is to create a list of Features > Stories > Tasks to fill the release notes. Using the above UI makes it pretty time intensive to find out the relation between the tasks and features.
Retrieve work items by calling
https://{account}.vsrm.visualstudio.com/[teamproject]/_apis/Release/releases/{current release id}/workitems?api-version=4.1-preview.1&baseReleaseId={compare release id}
It just return the id, url of work items, you need to get details of work item through Get a list of work items REST API.
来源：https://stackoverflow.com/questions/48909858/vsts-find-workitems-between-two-releases