Mexican
el durazno
Quiero un kilo de durazno.
I want a kilo of peaches.
Peach
Rioplatense
el durazno
Quiero un kilo de durazno.
I want a kilo of peaches.
Castilian
el melocotón
Quiero un kilo de melocotón.
I want a kilo of peaches.
Durazno is the usual market word in Mexico and in the River Plate region. Spain uses melocotón for the same fruit. Both are specific; neither is a prestige form of the other.