I've never actually seen the Kellam in person (but the pic looks OK), but my comment on the Delta Z is that it is a thick knife. Its build quality is excellent, and the fit, finish and materials (the wood is beautiful) used are top notch, but for a knife that is going to be in the pocket rolling around, it just seems too thick (from handle slab to handle slab) to be comfortable. I would say that it is overbuilt for what it is (a nice gent's knife). If you have the chance, take a look at one in person. I know someone who bought one and carried it at the office for a little while, but the weight and thickness (the thickness was his major complaint, and if you knew to look you could always see it in his front pocket of some Kakis) caused him to replace it as his EDC. He still has it and breaks it out occasionally, but I havent seen him carry it once this year.