A puro is a national recipe. Nicaraguan puro means every leaf is Nicaraguan. Cuban puro means the same for Cuba. The word is Spanish for cigar in casual speech; in English-language trade talk it means single-country.
It is not a quality medal. A puro can be cheap or careful. A blend that mixes Dominican filler with Ecuadorian wrapper can be either too. Padrón’s core lines are Nicaraguan puros of Cuban-seed tobacco. Fuente’s OpusX is a Dominican puro. Those are manufacturer facts, not a ranking.
See puro vs blend for the comparison, and cuban cigar for the island case.