Brand comparisons usually run on opinion. This one runs on settled transactions: 1,383 recorded sales of Omega and 189 of Zenith, all in US dollars so the figures are directly comparable.
What each one actually costs
The median Omega result is $3,120. The median Zenith result is $4,620. On typical examples, Zenith carries roughly 1.5 times the price of Omega at auction.
Half of all Omega sales land between $1,680 and $6,000. For Zenith the middle half runs $2,550 to $9,900.
Which one surprises the specialists
32% of Omega lots beat their high estimate, against 27% for Zenith. The two are closely matched, which suggests both are priced with similar confidence.
Breadth of the record
Our archive covers 407 distinct Omega references and 63 for Zenith, with results going back to 2001 and 2004 respectively. The top recorded result is $324,500 for Omega and $2,096,000 for Zenith.
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.