Hi,
These are two different products:
Smart-1 is a Check Point Appliance for running the Security Management Server or Multi-Domain Security Management:
https://www.checkpoint.com/products/security-management-appliances/
SmartLSM which is part of SmartProvisioning. is a Software Blade (Application) that lets you manage multiple gateways from one Security Management Server or Multi-Domain Security Management. SmartProvisioning defines, manages, and provisions (remotely configures) large-scale deployments of Check Point Security Gateways.
SmartLSM is good for managing hundreds to thousands of gateways.
Hope this helped
Tal