Halycon, knife springs are quite frequently made of non-stainless steels even if the blades are SS. Except of frequent immersions in salty water or frequent contact with fruit/vegetable juices it is a minor problem. To prevent the rust stains on your clothes (pockets), you can time by time clean the rust. I use paper napkins or tissue wrapped around toothpicks and some kind of lube. I carry some of my knives wrapped in small,thin plastic lunch bags, so they stay lint/dust-free in my pockets. It is a good way to slow down the rusting too. However if you want an easily deployable knife, this could be inconvenient for you.
So you if you are concerned with rusting, go with SS.
I have a Case yellow handled trapper with "Thrusharp surgical stainless steel" (420HC), the backspring on it rusts too, however maybe not as much as the one on my OT stockman. I have no experience with the UH line.
The Case knives I have open and close very easily, but have no consistent quality (varying fit and finish, blade play). My OT is more tight, has thicker (stronger) brass liners and even it was cheaper, its fit is better. If you want a stronger user knife, go with Schrade. Cases are definitely nicer looking ones, especially their scales.