Emanuele Cisi comparing and enjoying differences between all his Sphere Chamber FL pieces...from grenadilla to this last created made of silver plated Bronze at Cavallimusica in BresciaItaly. In order:

T383SP Grenadilla + D'addario select jazz unfiled 3M
T383SP Grenadilla II + D'addario select jazz unfiled 3M
T365SP Solid Silver + D'addario select jazz unfiled 3M
T383SP Spectruoso + D'addario select jazz unfiled 3M
T315MS Bronze with special long facing + FL 31/2