The following is an excerpt written by David Gray of Enneasite. This was originally posted in Enneagram Openings facebook group. It is describing one of the core differences between 4's and 9's. Enjoy!
" One way to do this (4 vs 9), imo, is to crank up (in abstract space) some of the pure fixated qualities and their specific 'problems'.
E.g.: 4s can hate/despise better than any other type. 'Better', meaning in a focused/lasering articulated way. 9s who mistype as 4s will usually recoil, to some degree, at that idea -- the idea that 4s, as a type, are the masters of targeted personal hate aimed at specific individuals, although 4-hate can (and often does) include general hatred for humanity or other groups, etc.
In roughly the same zone as hate (the general topic of Anger), 9s, in interior space, are much more 'nonverbal' in their anger. Anger, when it (finally) arises in a significant way, is flush through the body and calls out for physical manifestation in a way that's fairly foreign to 4.
iow, 9 anger is 'dumb' and brutish in the sense that it (unconsciously) fantasizes some form of physical annhilation of the other, per the Gut Center.
4 anger/hate is generally 'smart' and has a higher vibration, higher center of gravity, up in head/heart space.
4s are 'granulating' their emotions, to some degree, meaning there's a Head/Heart ping pong that has a sharpening quality to it; it fine-tunes the wording/vocabulary of feelings, it 'anunciates' clearly, compared to the Gut grunts.
4 chooses specific poisons, particular venoms. And the 4 inner dynamic amplifies feelings, because negative discriminating thinking (the nextdoor magnetic neighbor 5) naturally stokes the flames of negative feeling.
And, per the above, 4s really have no (or minimal) superego messages dictating that hate is 'bad/wrong.' In fact, again, the tendency is to amplify hate (internally) in plenty of instances.
That's a big difference -- 9s have much more superego messaging saying that certain feelings are bad/wrong and ought to not even be felt internally. " - David Gray