Why France preferred Amadeo I to a Prussian king in Spain

Did Amadeo I's accession cause French-Italian fallout comparable to the Hohenzollern candidacy that preceded the Franco-Prussian War?

There were tensions, but France preferred an Italian king to a Prussian ruler who could call on German troops to preserve his throne.

Amadeo I's accession created difficulties for France, but an Italian prince was less threatening than a Hohenzollern on the Spanish throne. A Prussian candidate could draw direct military support from the emerging German state if his rule came under pressure. That prospect made a peaceful resignation less likely and placed German influence on France's southern border. The French preference was therefore relative: Savoy rule in Madrid caused political friction, while Prussian rule posed a sharper strategic danger.