What's the difference between Kaguya's 'O kawaii koto' and Miyuki (Shirogane)'s 'O kawaii yatsu-me'?


From [Kaguya-sama: Love Is War](https://en.wikipedia.org/wiki/Kaguya-
sama:_Love_Is_War):

As you know (Gasai) from [memes](https://knowyourmeme.com/memes/o-kawaii-
koto), Kaguya often says (either actually or in Miyuki's imagination) 'お可愛いこと'
(o kawaii koto). You can even see like a compilation
[here](https://www.youtube.com/watch?v=90ao8I1djTE).

[![enter image description
here](https://i.stack.imgur.com/AlU0r.png)](https://i.stack.imgur.com/AlU0r.png)

Miyuki seems to say something similar (either actually or in Kaguya's
imagination) 'お可愛い奴め' (O kawaii yatsu-me ?)

From the anime S01E11 (eg [here](https://youtu.be/dmAqNh2qApE?t=50))

[![enter image description
here](https://i.stack.imgur.com/PvMFo.jpg)](https://i.stack.imgur.com/PvMFo.jpg)

or from the manga [Chapter 42](https://kaguyasama-wa-
kokurasetai.fandom.com/wiki/Chapter_42)

[![enter image description
here](https://i.stack.imgur.com/Rhfcn.png)](https://i.stack.imgur.com/Rhfcn.png)

Questions:

  1. What's the exact rōmaji here? O kawaii yatsu-me? O kawaii yatsume? O kawaii yatsuume?

  2. What's the difference? I'm guessing still 'practically they are used synonymously' again like the [2 true love's](https://anime.stackexchange.com/questions/66584/difference-between-the-2-true-love-that-kaguya-says)...but then theoretically though...?




This is a pretty simple, cursory answer, but:

こと here is a sentence-ending particle stereotypically associated with, I'd
say, elegant ladies/お嬢さん. Second to last entry, first definition
[here](https://dictionary.goo.ne.jp/word/%E3%81%93%E3%81%A8/), essentially it
expresses strong feelings.

Meanwhile やつめ is an actual noun. やつ is a not-so-polite way of saying 'a
person' and め is a suffix adding an additional insulting nuance, though in
this case it doesn't seem to be _too_ rough? It's something like 'cute little
devil', 'cute little fucker' depending on how roughly the character talks.

The hyphens aren't actually part of Romaji so you can use them or leave them
as you like, but 'yatsuume' would be pronounced differently and is wrong.

