Brand comparisons usually run on opinion. This one runs on settled transactions: 1,055 recorded sales of Vacheron Constantin and 779 of Breguet, all in US dollars so the figures are directly comparable.
What each one actually costs
The median Vacheron Constantin result is $8,125. The median Breguet result is $11,000. On typical examples, Breguet carries roughly 1.4 times the price of Vacheron Constantin at auction.
Half of all Vacheron Constantin sales land between $3,840 and $19,250. For Breguet the middle half runs $5,310 to $18,750.
Which one surprises the specialists
46% of Vacheron Constantin lots beat their high estimate, against 43% for Breguet. The two are closely matched, which suggests both are priced with similar confidence.
Breadth of the record
Our archive covers 314 distinct Vacheron Constantin references and 174 for Breguet, with results going back to 2001 and 2001 respectively. The top recorded result is $1,762,500 for Vacheron Constantin and $470,000 for Breguet.
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.