I think 5711 and 5740’s case/ bracelet’s size and thickness should be very similar.
Haven’t tried IWC’s bracelet before. But comparing with my vintage and modern Rolex, nautilus’s bracelet is much thinner and better polished with beveled edge on each and every link.
Read an impressive article before (? In PP magazine) describing the complex steps in polishing the nautilus’s bracelet.
Besides, the curvature of the integrated “lugs” fit the wrist perfectly.
Enjoy yours 5711 often, it’s a gem!
Best, Henry