For most sites, an IP address here identifies as Mexico first and Instituto del Fondo Nacional de la Vivienda para los Trabajadores COR second. Checks that stop at the country, and that is prices, catalogs, language and most geo-blocks, behave the same whether your exit sits in Instituto del Fondo Nacional de la Vivienda para los Trabajadores COR or in Coacalco.
City targeting starts to matter when the question is genuinely local: store stock and pickup, delivery estimates, local search results, regional pricing, or anything a map decides for you. If that is your task, ask for Instituto del Fondo Nacional de la Vivienda para los Trabajadores COR specifically. If it is not, the country exit is cheaper and far more stable.
City-level residential supply moves week to week everywhere, ours included. If nothing is live in Instituto del Fondo Nacional de la Vivienda para los Trabajadores COR the moment you ask, the reliable fallback is a Mexico exit, and the free Mexico list shows the public pool measured live.