Brand comparisons usually run on opinion. This one runs on settled transactions: 400 recorded sales of Piaget and 187 of Girard-Perregaux, all in US dollars so the figures are directly comparable.
What each one actually costs
The median Piaget result is $5,250. The median Girard-Perregaux result is $6,144. On typical examples, Girard-Perregaux carries roughly 1.2 times the price of Piaget at auction.
Half of all Piaget sales land between $3,570 and $10,240. For Girard-Perregaux the middle half runs $3,125 to $14,375.
Which one surprises the specialists
41% of Piaget lots beat their high estimate, against 42% for Girard-Perregaux. The two are closely matched, which suggests both are priced with similar confidence.
Breadth of the record
Our archive covers 156 distinct Piaget references and 84 for Girard-Perregaux, with results going back to 2001 and 2004 respectively. The top recorded result is $602,500 for Piaget and $193,350 for Girard-Perregaux.
What this does not tell you
A median is not a verdict. These brands overlap heavily at the edges, and a well chosen example of the cheaper one will outrun a poor example of the dearer one. Condition, completeness and model matter more than the badge on the dial.
