IMO the Emerson is the better, stronger knife. It is also a true classic among folding knives. It is no-frills and will likely require more break-in time out of the box than the Benchmade.
The Benchmade is a good knife, but not as rugged--blade thickness, handles, weight, etc. The axis lock is a good one but it uses springs. They break. It will also be more prone to infection by dirt and gunk. The Emerson will likely be far easier to sharpen and maintain--slot and phillips hardened screws; simpler, more basic lock (no moving parts).
If you tend toward lighter, slimmer, prettier, or suffer from the steel thing, get the Benchmade. If you want a more rugged, non-fancy, lifetime knife, the Emerson is the way to go.