it's a preference thing, at least from what i think. i like the kohls just as much as i like fluidline or kohl power, at least for waterline application.. i usually use blacktrack just bc i use it for my regular liner and it's one less product to look for. smolder does great, so does feline.. i actually really like to use phone number all around my eyes and on my waterline for a smudgy but still less intense eye...