Have you considered titanium?
The Cubano is Titanium!
A work colleague is having a Ristretto built right now. Having spoken at length with Darren, the Ristretto (steel with stainless back end in the Corretto style) and Cubano (ti) can be made to ride almost identically, the Cubano will be just a touch lighter. The Ristretto will have the "feel of steel", while the Cubano may have a touch more of that Ti comfort, but not masses of difference in it. The Cubano will have better corrosion resistance but personally I prefer the Corretto/Ristretto back end.
In summary, not masses in it, but if in doubt have a chat with them for their advice ref your weight/riding style/expectations.
The Cubano has zero resale value compared to the Ristretto which has near zero resale value.
I am interested in buying my "last" bike
Like my Pegoretti, I'm guessing resale value is of little to no importance.