The serrations on the Cold Steel work out fine for me, but they aren't for cutting wood, plastic or other hard items. They do work well on nylon rope, cardboard, meat and other materials. Plastic quickly dulls any blade and for nylon bands and thick, soft material, the serrations are great. In fact, as much as I despise half serrated, half plain knives, I have to say I like the CS combos, especially their Gunsite. Cold Steel used to make the Night Force and Pro-Lite models with serrations that weren't like tiny needles. They were short and stubby and quite strong. The blade steel was 440A.
For self defense and last ditch knives, it's really hard to beat the CS serrations. I can cut clean strips of paper using their serrated blades and that's pretty dern good. Using a cone diamond sharpener, sharpening the serrations is a breeze. (I can sharpen them while watching TV.) Someone gave me a used Vaquero 5-inch, the kind that came with a pouch and no belt clip, and I got that back to ripping sharp in no time, though you can tell by looking that some of the arcs that there's been some wear. Still, it had seen some hard use and was still going strong.
As far as comparing the Cold Steel and Buck plain edged models, I think the former is designed to take and hold more acute angles, whilst the latter takes more of a tough, working edge, the kind that might be used in hunting and heavier outdoor chores.