I had my bartender make this for me tonight since I don't have the vermouth (but will soon, since it is absolutely delicious!)- I enjoyed this quite a bit and will make it again. I think it might also be good with a bit less CioCiaro so that the vermouth has more of a presence.
I don't think they're similar - Amer Picon is heavy and caramelly, like Ramazzotti or other dark amaro. The Amer Nouvelle (IIRC) is a lighter spirit designed to show off the orange and gentian in a more neutral base. I'm getting them when they come to Texas, and will taste them side by side.