I agree w/ the other posters about diet.. If I am eating clean, that makes the world of difference in how the "cuts" look.
However, I like how my body looks best when I am lifting heavy for my upper body, and more endurance based training for lower. As far as "ab cuts" I see more development in my core when I am doing more kickboxing for cardio, and also using weights in my ab workousts.
Take care, Lynn M.