style of play is also a major consideration. Premier League is very physical, similar to MLS, where as Spanish/Italian leagues are more technical/finesse based which is the typical play-style in South America. Many South Americans struggle with style-of-play when coming to England (see Veron, Falcao, and many more) that doesn't mean there aren't successes, but many players that struggle in England thrive on the continent after they leave.