I use both but not at the same time. Depending on what I’m wearing, warm colors, warm makeup from blush to shadow to lips. Cool colors, cool makeup colors. Neutral colors like white or black? Whatever I’m in the mood for. But I’ll never wear a cool blush with warm lips…etc…I don’t mix. My foundation is always in the neutral range. If I’m wearing cool colors like pink or lavender, I wear a lighter foundation and go for that fresh look…if I’m wearing yellow,coral,colors I’ll go more bronze.