Okay, so I’ve got 2 friends in my life who are ENTJ and ESFP, respectively. Both young women in their 20s who are in my peer group, making them good for comparison.
The best I can describe it is the ENTJ tries to let off pressure at first in an indulgent Se way (a night out, a glass of her favorite wine, a vacation, etc.) Te-Se looping. If that doesn’t relieve the pressure, she then gets a bit “frantic” and uncharacteristically helpless/victimized in explaining herself to others. “Please believe me, this was what I was trying to do, why doesn’t anyone understand me??” Inferior Fi stuff. But the Fi still comes out through her dom Te - so she explains her feelings in a “heady” way. She’s expressing her intense Fi through her intellect, like a lawyer making a passionate defense in a court room.
The ESFP is much more raw in her Fi (sits with her feelings quietly, doesn’t express or intellectualize them) and becomes uncharacteristically removed in her demeanor. She also tends to bury her Fi under Te plans to improve her situation. So she’ll smile and brush off help/attention, say “it’s no big deal” and “it’ll all be okay”, even though I can tell she’s hurting. Then she’ll quietly boss up her life by taking immediate Se action on those Te plans (applying for a new job, joining a gym/club, getting on the dating market again, etc.) Se-Te loop. If those plans cannot be actualized quickly/effectively enough, she goes into a deep, quiet existential crisis thing. Inferior Ni stuff.
So while they’re swapping around the same functions and certainly easy to mix up because of it, the loops are different and the inferior grip stuff is different.
Basically they might look like negative versions of the other. Stressed ENTJ = whiny/moody, indulgent ESFP. Stressed ESFP = emotionally repressed, action-oriented, existential dread ENTJ.