I layer these two on a daily basis. I find stila's combs through well, looks really natural, and can hold a curl. Unfortunately i don't find it that thickening or the mascara dark enough! I rarely want natural-looking lashes..So i use MAC's Fibre Lash to make it look thicker/longer.. and on special days, i layer BE's Brushless mascara because its such a deeeep, dark, glossy black and makes my lashes just look luscious=P if i may say so myself! lol