Can two different passive preamp sound the same?

Can two different maker of a passive preamp sound the same? Assuming they use the same components through out...that is, same brand of volume pot, WBT RCA plugs (eg) and same cables for internal wiring.

Are passive preamps very dependent on the output of the CD player since technically they don't exude any musical "signature" of their own...or do they? And how do they compare to a tube based preamp?

Any thoughts?

Thanks!