Well, given that the apprehension of terrorists is, thankfully, a rather rare occurrence (at as far as the public knows) I don't think there is enough data to say how one police force will act compared to another. That being said, naturally there are standards to behavior in policing - and no doubt you will see similar behavior amongst the police of *any* western country.
I would rather compare the actions of the US and "Western" country police forces to, say, Russian police dealing with a hostage crisis with terrorist, or say the police in Kenya - who by there actions tend to show a much more lax attitude towards collateral damage...i.e. if a few civilians get whacked in the process of killing the terrorists, so be it. This is behavior I do not think you can ascribe to western police forces.
As for the concerns about whether or not a police agency should use deadly force against terrorist suspect that have been known to use deadly force, I think it is a ludicrous suggestion to even imply that we have acted too forcefully.
Major Hassan stood trial for his actions, after shooting people up on a military base. If the "US Police" forces had a tendency to all react in a similar violent manner, I think the good Major would have been spared the show trial. Same with the Bat Man movie shooter, and others.
I don't have a great deal of sympathy for someone gunned down in a shoot out after they have murdered civilians, and I don't think many do.
As for the gunning down of the woman in Washington - something went terribly wrong there, no doubt, but the media isn't really taking about it...the cover up is in play.