As you said French press can use to make espresso, but the taste you get from the real espresso machine, that you won't get from that one. Espresso machine have high pressure engines to brew and grinds, were it's dual boilers make the espresso to taste different.
Adding spices to beer that makes something different and a unique taste. Where many of us are not aware about dried and fresh spices. Its is good to use the dried spices rather than the fresh one. If we add fresh ginger to that, then the taste will differs from the usual.