I assume that much of the disparity of force has less to do with gun tactics used by European police and more to do with the normal cops not having guns on quick access for every encounter. Am I incorrect to assume that most of these European police are not carrying firearms as part of their normal patrols?
A cop not carrying a gun can't make the split second decision to gun someone down, and the lack of a lethal weapon may make them much less aggressive and more thoughtful in their approach to conflict resolution.
I am very much opposed to the idea of US cops using firearms with the intention to maim or disable because it almost certainly will mean that cops will be shooting and killing more people, not less. They are already far too quick to use firearms, I fail to see how broadening the tactics involving guns will help that one bit.