Like Jim said, either will work. I've found I get a little "sharper" edge by stabbing, but that's just me.
Which ever method you feel most comfortable with will most likely give you better results. Regardless of the method, make sure you have a nice "clean" design on the stock. Sounds obvious, but your carving is probably not going to be better than the drawing/design. I've found the better the drawing (clean, slim lines), the better the carving is going to be.
Ed