Within ENFPs there seems to be an enneagram dependence. Like we cognitively work similar but different enneagram seems to move the conversation in slightly different directions.
I find enneagram quite useful too. It describes my behaviour when I fall off the wagon quite well, and gives how to get back on. Being a 4w5 I seem to fall off the 5 wagon easier, which I've heard one or two others say also. Maybe the 4 is stronger, so the lessons of how to stay in the good half of it are learnt earlier.
I sometimes think of use of cognitive functions as what I was thrown genetically, and enneagram as a description of where my environment got me to go. The latter says more about goals than how I perceive things. As a 4w5 life is mining for knowledge and understanding of self and the world. To stop completely and just accept it is fatal, even if you know too much already. As an ENFP it makes me more inclined to seek understanding at any cost and fall into some of the bad ENFP traps. Like sometimes I undermine an opportunity because I see more to learn in failing than winning. 4 seems to be a romantic idealist only in the sense that the simple without that connection and learning will never be enough.