As far as corrosion resistance goes, i've been testing some Spydercos in my "Fog Chamber", a 2.5 gallon aquarium with an Ultrasonic Mister unit
knives are placed in the fog layer (balanced on a plastic soda bottle top) and left in the fog 24/7 continuously until rust forms
here's how the steels stacked up so far
Native S30V; cosmetic surface rust in 3 hours, actual rust damage in 9 days
Dragonfly AUS 8; cosmetic rust in 9 hours, damage in 10 days
Delica 4 SS SE VG-10; cosmetic rust in 24 hours, damage in 10 days
Pacific Salt and Salt 1; NO RUST at all, got bored and ended the test after 2 weeks
the Native rusted most extensively inside the SpyderHole, the unfinished areas of S30V inside the hole picked up rust quickly, the damage was a small rust patch on the front quarter of the blade, about 1" in from the tip
the Dragonfly got rust spots on the side of the blade and the 'Bug, inside the SpyderHole, and around the pivot pin, the cutting surface was not damaged, i ended this test due to safety concerns with rust around the pivot pin
the D4 had large patches of rust on the spine, the 'Bug, and inside the SpyderHole, a small patch of rust 1mm or so from the tip ended the test
the H-1 Salts just did..not..rust.. period, stop, end of story
out of all four tested blades, the Native had the least amount of *obvious* rust, and most of that rust inside the SpyderHole was cosmetic, the D4 had the most rust, the D'fly was somewhere inbetween
the threads are on the Spyderco website forums, if you're interested go there and search for my username
so, corrosion-wise, S30V may pick up cosmetic rust sooner, but it takes longer to get actual rust, wheras VG-10 takes longer to get cosmetic rust, but when it starts rusting, it rusts fast and extensively
that said, they're both excellent steels