A knife’s ability to stay sharp over time is a direct result of its hardness, which has more to do with the manufacturer’s process than it does with the specific base steel. While this is a bit of an oversimplification (as there are plenty of other factors that play their own small roles) it is helpful to illustrate the concept.
From what our team could deduce, the knife with the best edge retention on our list is going to be the Spyderco Kapara. When it comes to pocket knives, you really do get what you pay for, and the extra few bucks for the Kapara will provide its user with a harder, sharper, and more reliable blade than any of the other folding knives on our list.