Thanks for posting in Microsoft MECM Q&A forum.
Here is a similar thread for your reference:
MDT 2012: What's the difference between "DeploymentType=NewCOMPUTER" and "DeploymentType=Refresh"?
Thanks for your time.
If the response is helpful, please click "Accept Answer" and upvote it.
Note: Please follow the steps in our documentation to enable e-mail notifications if you want to receive the related email notification for this thread.