To be fair, they both have their useful applications! Like, I prefer, on most sandwiches, to use Miracle Whip, but some simply cannot taste right without mayonnaise. On the other hand, I like to dip my fries, and only mayo will do. And of the myriad mayos out there, I only buy Hellmann's!
ONLY REAL MAYO! I absolutely love a good organic real mayo, and Kewpie (japanese mayo, it's made with the yolk and apple cidar vinegar). Also I've had this stuff called Lemonaise, it's lemon (and I believe black pepper) mayo and it's super tasty