Brand comparisons usually run on opinion. This one runs on settled transactions: 400 recorded sales of Piaget and 144 of Roger Dubuis, all in US dollars so the figures are directly comparable.
What each one actually costs
The median Piaget result is $5,250. The median Roger Dubuis result is $10,752. On typical examples, Roger Dubuis carries roughly 2.0 times the price of Piaget at auction.
Half of all Piaget sales land between $3,570 and $10,240. For Roger Dubuis the middle half runs $7,200 to $19,550.
Which one surprises the specialists
41% of Piaget lots beat their high estimate, against 41% for Roger Dubuis. 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 31 for Roger Dubuis, with results going back to 2001 and 2004 respectively. The top recorded result is $602,500 for Piaget and $92,000 for Roger Dubuis.
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.