Inactivity limit VS Screen saver timeout GPO Policy

We are trying to decided between, the Computer vs User GPO Policies to force the screen to lock for our user workstations. Both seem to have the same overall effect of evoking the screen saver, effectively locking the users session.

Are there any advantages or disadvantages to either of these methods?

Interactive Logon: Machine inactivity limit Properties

Computer configuration polices└──Policies└──Windows Settings└──Security Settings└──Local Polices└──Security Options└──Interactive Logon: Machine inactivity limit Properties

VS

Screen Saver Timeout

User Configuration└──Administrative Templates└──Control Panel└──Personalization.  └──Screen saver timeout