throw out or pilot bearing?

[dmairspotter]

When the clutch is engaged the pilot bearing is not "working" since the primary shaft and the flywheel are locked together by the clutch. OTOH, stepping on the clutch puts load on the throwout bearing. If you had a ad one, I would expect it to be more noisy when you step on the clutch.

I've never worked on a boxster clutch, so others with more experience may have some better ideas.