· Characteristics of investor collaboration : ·SF4- The participants should have clear leadership with appropriate relationships , skills and knowledge . ·SF5- The scale of coalition gathered ( both scale of shareholding and overall AUM of group ) should be meaningful . ·SF6- The coalition should have a prior relationship and / or cultural awareness of the target company . 以上是原文,请问sf4和sf6同样提到了leadership,他们之间的区别是什么