How Do Rolexes Stack Up Against the Competition

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In the different manifestations of its offerings? For example-

-Diving use- How does the Sub line stack up against those from Omega or the Blancpain Fifty Fathoms?

-Aviation- Rolex GMT vs the Breitling Navitimer

-Use in heavy magnetic scenarios- Rolex Milgauss vs Omega Aqua Terra

I love the history of mechanical watches in general, and it would be interesting to see how Rolexes fare across a multitude of different scenarios. I am not just talking about the aesthetics, but the actual functionality of the watches.