Which one, which one, which one?! I personally prefer define-a-lash, because I love the curvy brush. Of course, it has no waterproof, which is beyond me. If you're going to go through the trouble of advertising such a fancy mascara, then why not make it so that swimmers can use it? Those marketing people... Anyhoo, the lashblast. Never tried it. I have gone into an Ulta store and seen what the brush looks like though. I felt it, too. Ultimately, using this mascara would be like putting black paint on a furry woodland creature, then stroking it on your lashes. However, it does come with waterproof kinds, unlike the maybelline. OUTCOME: You have to choose for yourself.