>>519014950
They aren't the exact same shit, that's why one costs more. You're buying rounds, not coins. Maples and Eagles are produced to a very high standard, while Buffalo's are just rounds produced by multiple different producers and are easily faked. When you sell an Eagle or a Maple it sells for more than spot because it's quality is assured and they are incredibly hard to fake. Meanwhile there are hundreds of variations of Buffalo rounds and are easy as fuck to fake especially if you're buying them online.
Yes, they are both 1oz of silver (hopefully at least) but Eagles will always sell and trade easier and be more sought-after. Don't buy rounds unless you're hella poor. Get coins or at the very least 40oz bars.