Well...
Lucia -> Lucia EX -> Lucia Pro,
Lucia and Lucia EX are "old friends" of printers, tested used and abused in any way possible. Lucia Pro is a completely different story. The new inkset has better D-Max, different gamut (better on some colors and worse on others) and different bronzing and gloss differential characteristics. All that raise a suspicion of it being a completely reformulated inkset, with the consequence of a different longevity rating. It could be better or worse, but if it was better they would surely advertise it. That makes us think it has to be worse... but the question is: how much worse?
The bronzing and some quirks with thicker paper already got me on the fence about buying a Pro 4000 as the fourth printer of our studio. "Not so good" longevity may be acceptable, but we can not say for sure without knowing how worse it is.
If I remember correctly, Mark from Aardenburg said it was too soon to give any solid info but so far the Lucia Pro was "not better" than the old inkset.