Project Management Office vs Organizational Project Management | PMO vs OPM

Project Management Office (PMO) developes Project
management strategies, prepare all documents, responsible
to train the project management staff, manage shared
resources and coordinates between multiple projects.
while
Organizational Project Management (OPM) is refers to the
systematic management of Projects, Programs and
Portfolios within an organization for its strategic objectives.

Project Management Office (PMO) is a department
within an organization that defines and maintain
project standards.
while
Organizational Project Management is a
framework which aligned the projects, programs
and portfolios with organizational strategy.