The types appear similar on the surface, but they're very different if you dig in.

EII gives a fairy/ sprite like impression while IEI is more royal.

Their focus is different. IEI is analytical about emotions, like all Fe types. They can focus greatly on the emotional expressions. (Not quite dense as to laugh in the face of a depressed person). Ni types do care about people's moods, I would actually argue that EIIs don't.

EIIs on the other hand are attuned to the impact people have on them and each other. To simply call Fi "the ethics of relationships" is not enough. Fi types feel the impact of other people so profoundly (and they talk about this) and this is why they become excellent judges of character. This is something Fe types don't do.

So, if they're talking about a movie they watched, IEI would be analytical about people's emotions and talk about general philosophy etc, while EII would talk more about what the characters are made of and their relationship to other. Ofc, this is an oversimplification.

IEI strikes more as a visionary, EII as more of a romantic or poet. One has a grand scope, a great vision, of how the world is like, etc while the other is more self contained (rational types in general are).

I posted the same video in one of Rose's threads:



The pink haired girl, Madoka, is EII and the dark haired girl is Homura, IEI



For a more obvious example, this scene is excellent. Kaoru is the IEI and Shinji is the EII. It's almost like they're talking different languages (the 2 minute mark). EII is much more grounded, and the focus is on the principles (you betrayed us!). IEI's focus is much broader and that HA Ti is hard to miss, exerting their worldview. Both types are rigid in that sense.

With EII, the emotional underatanding is the stuff that's not obviously displayed. They silently understand and in a sense, they don't communicate their feelings as freely and outwardly as IEIs. Fe's focus is on what is the obvious, what is readily visible. They're more expressive as a result.