Which language is more difficult for to learn?

I think the difficulty in learning any new language depends on how different the new language is compared to the one you already know. For example if an American wants to study Russian and knows a Slavic language, he can study Russian language easily, but it will be pretty hard if he doesn't know any Slavic language.

Anything purple is either new or slightly changed for example changed to a capitol letter. 

Anything green is a sentencce that has been rearranged to understand it better. 

Hope it helps!