Although some would disagree, there is no good reason Enneagram and Jungian-ased typology cannot coexist and intermingle. One concerns motivations and fears, the other how we perceive and judge the world and data. Neither steps on the other's toes as valuable tools and fascinating psychometric systems.
I'm not certain what statistical data there is to help this discussion, but I've seen 9s of a lot (if not every) mbti type on here and other forums, assuming they weren't mistyped. 9 seems to cover a lot of the introverted mbti types, but there's also a fair amount of extraverted 9s, particularly ENFPs.
The basic idea/goal of this thread is that 9 members of this forum of various jungian/mbti types can provide the most objective possible descriptions of their experience--what it means to be a 9 of _ _ _ _ type--so we can compare and contrast, and get an idea for the diversity of 9 types. I'm curious, for instance, how a Ne-dominant might operate differently than a Ni-dom, to offer just one example. The instinctual types and different wings give us even more to consider. Would an ENFP 9w1 so initially appear different than an ENFP 9w8 sx, for example?