I was behind an Aladia 757 in Vegas, I swear the FO messed up a cleared for takeoff instruction. This kind of culture of on the job training that airlines in SA have isn't really appealing and from what I've heard from pilots that fly into Mexico and beyond the flying isn't all that great especially since ATC sucks. Also I really doubt that you'd have an edge over at the majors because you flew a narrow body in SA. You obviously need TPIC, don't know if youre upgrading at Copa. Also some airlines like Fedex require that you flew for a U.S carrier. I'd probably stick to the states, yea you'll fly barbie jets but at least they're as technologically advanced and there's a lot of flying.