I think you guys might be reading a bit too much detail into your descriptions. I don't think one or the other necessarily makes a better leader, that is more up to the individual, anyone can be a good leader for example.
I think the key things to look at are: Straightforwardness of communication, and activity level.
I think ENFJs are more likely to act then think, ENFPs are more likely to think then act. On the converse, ENFJs will think before they speak frequently, and ENFPs just say what comes to their minds.
Also, on that note, ENFJs are not as straightforward, direct, or honest with their communication. They say what they think they need to say for effect, and are not above Bullshitting a little bit, if they think it will make other people feel better (in the short term at least) or prevent people from thinking poorly of themselves. ENFPs usually say what comes to mind, and although are aware of how it may effect people, say it directly, valuing open communication and honesty.
This is where I am going to interject my own opinion from experience: I think ENFJs are more likely to be ego driven for lack of a better word, they know how to manipulate people and are not always against it despite a strong sense of personal ethics. ENFPs are less likely to do this, but also struggle sometimes because of this. They are so direct it can hurt other people's opinions of them because other people are so used to (or prefer) getting BSed by less honest types.
I think in the end, if you have to make a leadership judgment,
I think ENFJs are more drawn to these positions, but actually make worse leaders. Normally people drawn to leadership positions are poor leaders because they are drawn there for selfish reasons. I think ENFJs that are drawn to leadership are more likely to do it out of arrogance, power, and ego, while ENFPs are more likely out of personal love for whatever they are leading, or because they don't want to be lead by someone else. I know personally, I think our (humans) current leadership hierarchy is far too vertical, and needs to be more horizontal. We need to be equals, not have 1 leader who tells us all what to do. That said, in the end, it matters on each individual reading this and their preferred leadership style. Some people prefer more selfish style leaders, and others more self sacrificing.
ENFJs are more convincing leaders, but ENFPs are better ones.
ENFJs are more traditional leaders, but ENFPs are more progressive in their leadership.
ENFJs are more organized leaders, but ENFPs are more thoughtful ones.
I talked earlier about the conscious differences that they display in their communication (ENFPs consciously try and be more honest, ENFJs more consciously try and consider other people feelings before speaking. However, on the unconscious realm it is a different story. The unconscious must be observed because clearly even the individual is not very aware of these impulses. I believe on the unconscious level:
ENFJs words are adapted for others but their actions are more selfish
ENFPs actions are adapted for others but their words are more selfish
This may seem counter intuitive to the introverted actions of an ENFP and the extraverted actions of the ENFJ, but I think that usually our extroverted sides are more selfish while appearing to consider others. This is why extroversion is more common, but also more shunned universally. The majority is usually survivable, and the minority correct. If the minority wasn't right, they would have little need to exist.
I also think ENFPs, tend to lead and think more long term, and ENFJs more short term, however both types are pretty long term oriented. An example is how the ENFJ is more likely to be less than honest to make someone feel better. If they can make someone feel better in the moment they feel better, but they don't always think of the long run and how this will affect the person if said individual knew their true intentions.
In the end though, I think the leadership style is more about the person than the Myers Briggs type, remember there are only 16 types, and there are way more people than that on the Earth.
Last note: I am an ENFP (4w5) myself and this may make it hard for me to judge an ENFJ (and vice versa), of course it could also make my judgments more bitingly accurate too. Don't you love the gray? Nothing closer mirrors reality than fence sitting, because our world is rarely boxed in so easily. Also, given the fact that we are so connected to our functions (you can't separate Extroverted Intuition from Introverted Feeling), and because we frequently display traits from out of type (an ENFJ will frequently experience Extroverted Intuition and Introverted Feeling despite their preference being the opposite) it makes it very difficult to properly pin types down with any sort of accurate certainty.
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