Boy, that's kind of rude. Accents/dialects vary throughout the country.
Seems to me that *most* people say them very similarly, except for people from the Northeast. My college linguistics professor said I had no regional accent (It wasn't a compliment. He considered me "linguistically impoverished" because of it

). I say the words VERY similarly.
And, for the record, I learned in school that marry/merry and berry/bury and vary/very were homophones.
Me, too. I don't think I pronounce them *exactly* the same, but it's close enough that I'd you'd probably need to depend on context to figure them out.
(I think I pronounce Mary and marry the same. Merry is ever-so-slightly different, but not enough to really count.)