In fact I had in mind the look and spirit aspects (colors combination, steel...) more than the toolwatch skills (waterproof capabilities, case resilience to shocks and scratches...).
I would wear the 5960 in a rocket but you're right, for thougher activities and underwater traveling, the Aquanaut suits better.
Finally, quite a diversified offer from Patek Philippe when considering Sports.
I'm sure you'll be thinking about us when under the water Kari 
Thanks for sharing your interesting opinion on that matter.
Cheers, Mark