grammar - Question about に and には in terms of emphasis

I read the post on here from 2011 about the difference between に and には, but I came back still a little confused (especially with all the non-layman grammar words like transitive/nominative/etc).

I have two examples and I think I know how to use には, but I'm wondering if someone could double-check or expand on the subject.

日本語はアメリカ人には難しいと思います。

I think Japanese is (more) difficult for Americans (as opposed to other nationalities).

So, in a way, I'm implying that I'm taking into consideration other nationalities compared to Americans in terms of English being difficult, putting emphasis that it is much harder for Americans compared to others.

日本語はアメリカ人に難しいと思います。

I think Japanese is difficult for Americans.

This would be just saying that Japanese is hard for Americans, not comparing it to any other country/nationality. So its implied I could also think Japanese is equally as hard for, say, Russian people and that Americans don't necessarily have a harder time.

What do you all think? Would love some feedback to properly understand には better.