The Epos is a pretty good ripoff of the Altiplano (and the JLC Master Ultra-Thin), and a good, solid watch. The Peseux 7001 movement it uses is, like the Piaget 430P, a variation on the standard 17-jewel handwind design used by the Swiss for many decades, but the resemblance requires some distance.
Up close, the Piaget movement has loads of hand-finishing not found in the Peseux—anglage, fire-blued rather than lacquered blue screws, perlage on the main plate—plus an inset adjustment plate on the winding bridge. The 430P will have several dozen hours in the hands of a master watchmaker more then the Peseux, at least in the trim level used by Epos.
I think if you held both in your hands, you would not need golden eyes to see the difference. Whether that difference is worth so much more money is, of course, a whole different question.
Rick “both would have been plain daily-wear watches back in the 50’s and earlier” Denney