I focused on the question of being driven because unmotorised cars and trainsets don't have such nice short code-names, but the more important difference is in the tilting systems. The Talgo has no bogies but single wheels between the cars, which are mounted on the wheels so that they can swing like a pendulum (moved by inertial forces, hence "passive") - but only a maximum 3°. But the Pendolino has bogies, and a dual frame, and relative motion is forced by actuators between the frames (hence "active"), to a maximum of 8-10°.

_{*Lunatic*, n.
One whose delusions are out of fashion.}