easiest way to tell the difference is to look at quadra values and how you act in groups, otherwise these two types can look nearly identical. I think that in group settings, IEIs can seem surprisingly extroverted, whereas EII will be much less so, but there are exceptions of course. also look at Ti vs Te valuing - IEIs can be mistaken for LIIs due to high N and strongly valued Ti. you definitely VI IEI to me though.