While most carving chisels are ground with a chisel edge, not so for most knives. The chisel grind causes drift even for chisels. So if you want to cut to line if have to clear out material first or the cut will drift. For whittling you want a knife ground both sides. Pick up a Woodcraft Supply catalog they have all kind of good wood carving knives and chisels. Many seem seem very similar to the Scandivanian knives sold by James Mattis.