From a 'strength' perspective, they're pretty good, IMO. In the 'playstyle' perspective, they're completely different. You want to go tall almost certainly, where before they were rather encouraged (IMO) to go wide.
And the Chateaux are the key aspect to make everything work. You want to Wonderspam just the culture ones (most importantly the Louvre--nice touch there--and the Uffizi), and then watch your Tourism soar (pun intended) when Flight is researched.