It's not even close to the same amount of work, the construction worker in Mexico has to be far, far more resourceful than his American counterpart because things that we take for granted in the states like having on-site power, a constant supply of water, porta johns, working power tools, safety equipment and padding, nearby air conditioned restaurants and other public spaces to cool off in after the job or on lunch breaks, transportation to and from the site are largely absent in most Mexican construction circumstances. Things like sawbucks and and jigs for bending and shaping rebar are almost always just improvised on site.

The concept of the US style planned development (fraccionamiento, very loosely the MX counterpart) where basic service infrastructure is laid down first, and construction happens afterward, is very much the exception there, and most work is done ad hoc using whatever tooling happens to be available in the nearest small town.

Also Mexican construction is almost entirely cement and cinder block standards due to relatively little native timber, and those things are all hauled around the site manually with occasional wheelbarrow assistance. None of this tilt up, balloon frame stick built business we have here.

Bottom line being that the typical Mexican construction laborer is going to be much more well-rounded, flexible, and industrious then the typical American construction worker, and as such is worth far more to an American crew, where these traits stand out, than to a Mexican crew where they are the norm.