Okay, as a new member of the forum, I'm going out on a limb here, but I'm going to say that there is a place for both the FRN Endura 3 and the FRN Endura 4 -- the E4 is less a redesigned E3, and more a different knife altogether.
First, the weight differential is substantial. The steel liners are great on the E4, but it takes the weight up to a point where it is no longer a lightweight knife in a class by itself. Whereas, the E3 doesn't have the same heft, I can think of few, if any, roughly 4-inch, 3mm thick, folders that are as light (and has high quality) as the E3. Check the Spyderco and BM lineups, and you'll see what I mean. I carry my E3 in a suit jacket or trouser pocket with no change in the lay of my clothes; this is not the case with the E4.
Second, the handle design is completely different. The E3 is designed so that the middle and ring fingers rest on the middle ramp in the handle, whereas the E4 is designed so that only the middle finger rests on the middle ramp (the ring finger rests within the last ramp). IMO, this changes the way the knife rests in the hand.
Third, the blade shape is not the same. The E3 is significantly pointier than the E4, and the E3 blade is slightly longer (not sure if this is part of the design, or just my knives in particular).
So my question is, why not keep the FRN E3 in the lineup?
First, the weight differential is substantial. The steel liners are great on the E4, but it takes the weight up to a point where it is no longer a lightweight knife in a class by itself. Whereas, the E3 doesn't have the same heft, I can think of few, if any, roughly 4-inch, 3mm thick, folders that are as light (and has high quality) as the E3. Check the Spyderco and BM lineups, and you'll see what I mean. I carry my E3 in a suit jacket or trouser pocket with no change in the lay of my clothes; this is not the case with the E4.
Second, the handle design is completely different. The E3 is designed so that the middle and ring fingers rest on the middle ramp in the handle, whereas the E4 is designed so that only the middle finger rests on the middle ramp (the ring finger rests within the last ramp). IMO, this changes the way the knife rests in the hand.
Third, the blade shape is not the same. The E3 is significantly pointier than the E4, and the E3 blade is slightly longer (not sure if this is part of the design, or just my knives in particular).
So my question is, why not keep the FRN E3 in the lineup?