Brand comparisons usually run on opinion. This one runs on settled transactions: 426 recorded sales of Franck Muller and 125 of Bulgari, all in US dollars so the figures are directly comparable.
What each one actually costs
The median Franck Muller result is $6,875. The median Bulgari result is $3,500. On typical examples, Franck Muller carries roughly 2.0 times the price of Bulgari at auction.
Half of all Franck Muller sales land between $4,825 and $10,560. For Bulgari the middle half runs $1,664 to $9,600.
Which one surprises the specialists
50% of Franck Muller lots beat their high estimate, against 48% for Bulgari. The two are closely matched, which suggests both are priced with similar confidence.
Breadth of the record
Our archive covers 82 distinct Franck Muller references and 23 for Bulgari, with results going back to 2001 and 2006 respectively. The top recorded result is $164,500 for Franck Muller and $277,200 for Bulgari.
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.