Is there any benefits to moving from 10.6.1 to 10.7.1? also please provide the benefits compare between portal 10.6.1 Vs 10.7.1
you could examine the changelog and decide
What's new in ArcGIS Enterprise 10.7.1—ArcGIS Enterprise | ArcGIS Enterprise
What's new in the ArcGIS Enterprise 10.7.1 portal—Portal for ArcGIS (10.7 and 10.7.1) | ArcGIS Enterprise
To call out a few specific items:
ArcGIS Notebook Server
As Dan said, you would need to review all the What's New doc and make a determination as to what is most important for you and your organization.
Retrieving data ...