The difference is that instead of insurrection being the sole cause for using T10 forces (to include Federalized Guard forces), it is now allowed for “natural disaster, epidemic, or other serious public health emergency, terrorist attack or incident”.
But the trigger is not the type of incident, but rather the associated out-of-control violence and lawbreaking. I.E.: insurrection against local authority. If there were a terrorist attack ala 9/11, which had no subsequent riots, then I don’t see where this law would be triggered. Where it could be triggered is when another Blanco sat and dithered while half her state rioted. But, then, Congress could have authorized a response in that case anyway.