From what I understand IEIs are not good at business logic & facts, but they like to philosophize and use Ti structural logic as a guide for their goals, at least up to a certain point.
For IEEs its supposed to be the other way round, they enjoy facts and business logic up to a certain point, but they have a hard time putting it all together in a way that makes sense.
IEI kinda want to understand how things are connected (the system). If you point out that they suck at managing resources, that's gonna hurt.
IEEs kinda want to know the facts and what is more of a efficient use of resources. If you point out that they have a hard time explaining things, that's gonna hurt.