verify is like a dry run. It will not do anything expect of verifying syntax.
However a tmsh load sys config will also verify the config you are importing.
Depending on what you plan to do, pay attention to use the merge parameter. Otherwise you might overwrite stuff that you will desperately miss afterwards.
Raqs what was your outcome from this in PROD. In a Active-Standby. My experience it won't down the box. HOwever, you'll have changes pending messages. After hours, from a copy of the running-config you just paste that into the running config and sync changes. Crisis averted! Maybe you have to stop processes?