I use the Chroma Essence shade because it accepts colorization well. Its much like the 34 shade from Candulor. It is a more opaque shade than most and contains micro fibers rather than long. Looks much different in the mouth than on a countertop.
Better is a subjective term. I am doing the majority of our stuff with IVOCAP now days but I still prefer to colorize with compression packing. I guess its just my comfort level right now but I am experimenting with multiple techniques with the closed flask.