LSIs are very literal. Only quantifiable things are acceptable and only quantifiable things are produced; there's very little ambiguity with them at all.
ESIs prefer quantifiable input but often don't produce it for others; they can be quite ambiguous but hate it when someone else is. They seem to turn quantifiable information into the qualitative, which can make them rather inventive in an artistic sense.
ESIs tend to have much thinner skins and seem less confident in themselves than LSIs, but this can be all for show. LSIs seem far more rigid, inflexible and or regimented while ESIs have a soft outer layer that covers an equally hard interior. To tell them apart, look for a soft coat, and if it's not there, think LSI......

a.k.a. I/O