is playing in football leagues like argentina,brazil,or iran and japan hard for world class european player?

[badgirl]

i always think playing in those asian and latin american leagues are much harder than serie A or other famous footbal leagues.

[Mandana5059]

I think the Argentinian and Brazilian leagues are so much different from Japanese or Iranian league. The Asian leagues are never on the level of European or South American ones.
I really would like to know why do you believe playing in non European leagues is tougher, but I think it is easier. The rivals aren't as strong as are in top leagues, but maybe the atmosphere is a bit more difficult and complex.
On the whole my answer to your question is no. As long as players get paid enough, everywhere is easy for them to play.