The one prefers French shutters of PVC-U, the other of aluminium. Both have their strengths. Decide for yourself which of these materials you prefer.
The French shutter system Elba consists of aluminium, i.e. it is light and yet stable, in particular its special load bearing properties at the corner connectors.
Aluminium French shutters from the Elba system come in a number of alternatives: with movable or fixed slats, or with panelling of board profiles. All variants are, of course, available in a wide range of laminates from plain colours to woodgrains.