Well, they're both 33 mm cases . . .
. . . with basically identical movements. The steel Omega might be 32.5 mm, which would help account for its seemingly larger subdial.
Comments: view entire thread
Only 18 Small Second Subdials
There is something elegant about a small seconds subdial. It visually puts the seconds in sight, but also in proportion to their magnitude in measuring time. Below the dial, small seconds are driven by a cleaner, simpler gear train than the now-popular ce...
Also a fan . . .
. . . of subsidiary seconds. And I wouldn't be surprised if every incoming from here on out shares the classic lay-out. Art ...