Focus
ITSM is service-oriented and focuses on the provision and management of IT services to meet business needs. ITOM is infrastructure-oriented and focuses on the management and maintenance of the underlying IT infrastructure.
Scope
ITSM covers the entire lifecycle of IT services, from planning and design to delivery and support. ITOM focuses on the operational aspects of the infrastructure, including monitoring, maintenance and incident management.
Metrics
ITSM uses metrics such as customer satisfaction, service availability and incident resolution time. ITOM uses metrics such as server uptime, network latency and application performance.