That is why I think Giolito has a higher ceiling. He at the very least has a slider and changeup that are very good, and occasionally he'll flash that ++ curve. Gio's slider is more consistent than his curve. Lopez has a big fastball but his secondary stuff isn't that great. His change is ok to flashing + but his breaking balls are lacking. Lopez should pick either the curve or slider and try to develop feel for one of them. If I were him I'd choose the curveball because it is a different velocity than his changeup, while the slider is similar in velocity.