Differences between INFJ and ENFJ
It may help you work out your type if we compare the similarities and differences between INFJ and ENFJ.
One important thing to look at is which preferences 'dominate' the personality. Carl Jung and Isabel Briggs Myers said there is a 'dominant function'. What this means, in simple terms, is that two of the letters in the type code are much more important than the others.
For people with INFJ preferences, the most important letters are I and N. For people with ENFJ preferences, the most important letters are E and F. This means that there is a very important difference between INFJ and ENFJ. The letters in the type code that are particularly important for them are different, or they have different 'dominant functions'.
The Dominant Function
For INFJ the most important preferences are Introverted Intuition. Your 'dominant function' is Intuition, oriented towards the inner world. You use your imagination to create new and different ideas and perspectives. You observe the world around you, and use your imagination to consider what you have observed from a number of different perspectives. You dream up new ideas and insights, often producing radical solutions to problems. You have a long term vision, and demonstrate an apparent understanding of what (as far as other people are concerned) cannot be clearly known.
For ENFJ, however, the most important preferences are Extraverted Feeling. Your 'dominant function' is Feeling, oriented towards the outer world. This means you focus on building harmony in the world around you. You like to build rapport with people and create a positive atmosphere. You look after people's welfare. You naturally want to motivate others and make sure they are happy in each situation. You value other people's contributions, seek to develop the role that others play, and invest a lot of effort in building positive relationships. You try to overcome differences of opinion and find ways in which people can agree.
Preference Differences
INFJ and ENFJ differ in Extraversion/Introversion. This preference is about where you prefer to direct your energy. If you prefer to direct your energy to deal with people, things, situations, or 'the outer world', then your preference is for Extraversion. If you prefer to direct your energy to deal with ideas, information, explanations or beliefs, or 'the inner world', then your preference is for Introversion.
Everybody uses both sides of the preferences at times, depending on the circumstances. But the difference between the two personality types is your natural inclination. That is, which would you prefer to do in a situation of free choice?