After reading two Enneagram type descriptions, it appears to me that 7w8 and 8w7 have alot in common...
Seven with an Eight-Wing
The traits of a Seven combining with the Eight produce one of the more aggressive personality types. No one frustrates people of this sub-type without hearing about it. They are extremely industrious, goal-oriented, pragmatic and ambitious. They use their drive and high energy to maintain an active lifestyle, and are less worried about having others along for the ride. Their ego can be considerable, but the Eight wing gives them more focus on tasks than the easily distracted Seven with a Six-wing.
Healthy people of this sub-type are exuberant and enthusiastic, since they are fundamentaly Sevens. They are people who truly enjoy the world and the good things in life. The Seven’s avid intelligence combined with the Eight’s daring and drive often results in material success. The Eight-wing adds self-confidence and willpower to help them overcome obstacles and endure hardship. They can be great leaders known for their quick minds. They are noticably adult, earthy, businesslike, and tenacious. Sevens with an Eight-wing know that they can get what they want out of life.
Eight with a Seven-Wing
The traits of the Eight and those of the Seven reinforce each other to produce a very aggressive subtype. Eights with a Seven-wing are the most openly assertive of all the subtypes because each of the component types is aggressive–Eights in their quest for power and autonomy and Sevens in their acquisition of experiences and possessions. They are generally more blunt, realistic, and extroverted than Eights with a Nine-wing, and somewhat more consistent in their self-presentation. They tend to be the same at work as they are at home, and tend to treat all people in their lives similarly. There is a “cut to the chase,” no-nonsense quality about Eights with a Seven-wing, and they do not hesitate to express what they really think or feel. They are definitely people of action, and are strongly compelled to interact intensely with the environment and with others.
Healthy people of this subtype will be highly extroverted, action-oriented, and extremely energetic, combining the Seven’s quick mind with the Eight’s vision for practical possibilities. They take the initiative almost all of the time in business and personal relationships. They are attracted to entrepreneurial endeavors, creating businesses and projects. They are perhaps the most independent subtype and generally don’t like working for others unless doing so will eventually lead them to more independence.
The healthy Eight’s charisma combines with the healthy Seven’s capacity to enjoy life, producing an extraordinarily outgoing personality, often attracting many people and involving them in their hopes and plans. They create opportunities for others and enjoy challenging people to make something of themselves. There is a joyful enthusiasm for living life and sharing their experiences. Their inner strength will have a practical focus in the concern they show for the material well-being of others.
I'm a 7w8 by the way...