I am having a difficult time deciding between space black SS and space grey aluminium Apple Watch.
I swimming 3-4 times a week and is wondering which offers better corrosion resistance to both chlorine and salt? thanks[/QUOTE
As long as you rinse both watches after a swim, I doubt that corrosion would be an issue with either one. The bigger difference between the 2 watches are the lens and the coating. If cost is not a factor the SS screen and body will be able to take more abuse with out penetrating the surface. If your just considering corrosion, I don't think it really matters as long as you clean your watch from salt and chlorine residue on a regular basis.