My impression is that Russell is pro-active because he doesn't have a fear and is not embarrassed about being wrong. He views being wrong as just part of the territory and just all in a days work. You win some, you lose some but at least we had good intentions.
Hamilton on the other hand as I've perceived him over the years has a great fear of being wrong that limits him strategically. He is never decisive or taking ownership of strategy in times where it would benefit him because he's afraid of being wrong. I noticed he likes to tow both lines of suggesting the alternative, but not demanding it. Then if it turns out that the team was wrong, he'll let everyone know after the race that he thought otherwise and the team was wrong because that position is more comfortable for him. You almost never hear the opposite situation where Hamilton decided a strategy and it was wrong because he doesn't put himself in that scenario. He worries too much about how he is viewed. The image he sees for himself is of a driver who can do no wrong so he avoids taking these chances, like Russell, in order to protect that image. Hamilton should never worry about being wrong. Good intentions matters more. You tried, it went wrong. There is no shame in that, and it doesn't make you any less of a champion. Being a 7x WDC doesn't mean you are not allowed to be seen making mistakes. He must take this pressure off himself.
We all saw Russell's decisive calls for better or worse in Canada, Zandvoort, and Mexico. He has no fear and it not embarassed about being wrong. He's more concerned with doing his best to make a decision, and if it goes wrong, it's like water off a duck's back.