How do the Pelagos 39 and the Submariner Compare ?

They Don't

In-house movement, preferably under 38mm. Distinctive face! That being said I love my SNXS17 as much as my Aqua Terra Small Seconds Blue Dial on Rubber (which made me break my own rules)

No respectable watch collector would be caught without one. I just picked up an Omega Aqua Terra Small Seconds 41mm today and it sits next to my Casio Worldtimer

Fliegers can be found in most brands, but the Santos is unique to Cartier or at least less copied

H70455133 Hamilton Khaki Field Auto

Seiko Sarb033 if you can find one

I have both and they're great

I absolutely love the AT small seconds in that colour, but I prefer it on the rubber for contrast.

That given, I had a call from my AD saying my BB58 black on steel bracelet arrived, so I grasped the opportunity as my one luxury watch to supplement my Hamiltons and Seiko's. And cheaper by quite a few thousand to boot. If I had the funds, I'd own them both. Eventually, I  probably get bored with whichever watch I wear, however my Hammy Khaki Field 38mm Auto and Sarb033 I never get bored with

IF WATCHES WERE KIDS WE'D HAVE HUNDREDS!