 Usually the technical grade increases with the adjectival grade, but a hard technical move that is well protected (that is, notionally safe) may not raise the standard of the adjectival grade very much.VS 4c might be a typical grade for a route.VS 4a might indicate very poor protection (easy moves, but no gear) or extremely sustained (every move is 4a and the climbing is steep/strenuous whilst reasonably protected), while VS 5b would usually indicate one crux move of 5b that is the first move or very well protected and the rest of the climb without much difficulty.