Both of these insights agree on what power is, and that working together gets you more of it. The key detail is where does that extra power go? How is it manifested?
[ ] Power is the ability to act on or resist the world, it manifests through many forces. The great and the small, the subtle and the strong, amplify in unity.
The key wording here is "amplify in unity". Everyone gets stronger, teamwork is effectively slapping a x1.2 modifier on everyone. I like this insight, nothing wrong here.
[ ] Power is the ability to act on or resist the world, it manifests through many forces. No individual is great in all. Power united is greater than its parts.
The key wording here is "greater than its parts". There is power in a group intrinsic to the group itself, not held by any individual member. There is a great kurzgesagt video on emergence that describes it better than I ever could. Personally I think this is a valuable insight and stance to have, especially when trying to build organizations and culture.
"No individual is great in all" has been seen by some as a limit, but I think it's actually an important reminder. Nobody is perfect, everybody has weaknesses. Both for taking on enemies, and on allowing ourselves to be supported by allies. I'll also note this isn't an insight permanently defining our way, but our definition of a concept. It's still important, but it's more flexible.
[X] Power is the ability to act on or resist the world, it manifests through many forces. No individual is great in all. Power united is greater than its parts.