Unfortunately that doesn't imply the quality is better. I took a used set of Edelbrocks in to the racing engine builder/machinist I used back in CO to be freshened up and they needed a lot more than would be expected from a used set of heads. Guides were too tight, valve seats were garbage, variance in port sizes/shapes. If I had to do it again I'd either get a set of Speedmasters and have them gone through or just pony up for Trick Flows.
BTW all this (previous) "buy American" stuff, the companies are more to blame than consumers. Maximizing profit margins with cheap labor and passing the gains on to their executives and shareholders and screwing the workers out of jobs. Then you also have our labor laws that make production expensive to begin with in this country. It's a complicated issue that can't simply be solved by buying Made in USA stuff although it does help, I still do it when possible.