Oops, accidentally I clicked on "constructive" for this post, but I wanted to "like" it. >_<
Yeah, I have observed the same, haha. ESI and IEI can look very similar on the outside, especially because both have got the same
"Sincere" Communication Style, they both value Se, both can appear shy, both tend to be elegant, and the ESI can appear Victim:
I suppose the same applies to the SEI, who can also appear very similar to an IEI based on most of the same reasons.
All in all, it really could be simply a numbers' game. More ESI and SEI girls around, more ESI/SEI-SLE couples.