Which mascara is better? CoverGirl Lashblast Waterproof or Maybelline Great Lash Waterproof.?

I heard from friends and online that these two products are great! Which mascara do you think works better? Im looking for the one that does not smudge, makes lashes look long and full, and can be worn underwater (lake or pool). Tell me HOW you know it works well from your own usage and experience.
Thanks :D
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