I have both and they are two of my very favorite folders (along with the Large and Small Sebenzas, the BM710, The Buck 110

and the M16-01F). These two knives almost allow me to forget how much I hate liner locks.
The SERE2K is very nicely done. The fit and finish are excellant and the design is good. It is sturdy, comfortable, a bit heavy, but tough. The bladeshape is not my favorite, but I really like VG-10 and just about all of the other attributes and characteristics of this knife. I usually do not acrry it with suits and ties or lightweight, loosefitting pants, but it is a heck of a knife. If I wore jeans all the time, this would be a worker/tactical folder that would be with me most of the time. VG-10, G-10, sturdy construction and darn near flawless pproduciton execution make this knife a winner.
As to the Buck Strider, I have to first say that I prefer a full tang fixed blade to any folder! from my Simonich Talons and Greco "Little Baron" through the Project 1 and Basic 9, I prefer full tang fixed blades. With that said, sheeple and circumstances often times all buit require a folder. I am not seeking a political debate here, just letting you know how I see things in many parts of the country and world. For those times when you really should have a fixed blade but need or want a folder, there is the Buck Strider. I have one with the BG-42 Spearpoint and would put it up against any folder for ruggedness, strength and use/abuse survival.
I ask you this: How big are your hands? The SERE2K is large and the B-S is beyond large. How much real abuse will the knife see? The extra weight, girth and arguably cumbersome
over design of the B-S is like a spare tire, excess baggage ...
until you need it, then it's worth its weight in gold! What do you already have? Do you have a good, lightweight, sleek slicer like the Military, Endura, BM710 or the like? Will this be your EDC "do everything one and only?" If so, the S2K edges out. If it will be your "reserved for extreme duty" user/beater, then the Buck-Strider has few peers. None, IMO, at anywhere near the pricepoint.