Both great knives, with the Chef having the better steel (even though I don't mind S30V).
The OP asked to exclude talk of materials, and give feedback on design, mostly.
In that regard, there're a few points I'd like to make.
Firstly, the Chef is a heavier knife, with a much more understated design (to most folk, at least). The Kapara, with it's superb CF scales, as well as the fancy red backspacer is a real show stopper. It is also leaner and takes less pocket space. Real unusual knife design for Spyderco, in terms of how slender it really is.
The Kapara also feels nicer in the hand, as it is less "slabby" due to the contoured and slender handle.
Now, I am not a big fan of either locks, but I can use the frame lock easier with my left hand (I'm not a lefty, but am entirely ambidextrous). Most righties would prefer the compression lock, however. It is more unique to Spyderco, and is a superb lock.
The Chef does get an advantage for it's design if you're going to be cutting on a surface. The Chef has a bigger 'negative" cutting angle and a wider blade - which helps keep those knuckles further away from the cutting surface, and drive more force into what you're cutting.
Somebody mention that the LC200N blade on the Chef is too thick, and while I completely disagree with this statement - I have to admit it is thicker at it's stock than the Kapara. For me, the taller blade counters this trait nicely, though - It allows for a supremely thin cutting edge, even with a thicker stock. It actually is a feature that I absolutely love, since it makes the knife more robust and "hard use" ready.
That's perhaps the biggest difference between the two knives - the Chef feels like a much more robust folder. It feels like a knife you can thrash on, while the Kapara (even though you probably can thrash on it just as hard) feels a bit more delicate. To me, this great robust feel, combined with being a tremendous slicer makes the Chef the perfect EDC folder. That' me, however.
Now, I cannot avoid mentioning that the Chef's ability to survive a highly corrosive environment gives it additional points, and makes it a clear win for me.
But from design stand-point both knives are terrific, and you cannot go wrong with any of them. Just buy the one you like most in terms of its looks, and keep join mind that eventually you'll most likely own both.