What you need to show is a connection from the worksurface to ground. If you check the worksurface to groundable point and grondable point to the selected grounding system at the same time, then you could use that as part of the compliance verification. However, you would need to document that and prove it with a technical justification.
If you do this with two separate measurements, the case could be made that you never really check the entire system at once.
In my opinion, why do two separate measurements when one will do?