I doubt that at over a tonne heavier than the B200 the Cit 2 could pull up in a similar distance as a Beech. Remember the Beech has two huge 'barn doors' with reverse as std, just in Beta alone the drag is noticeable. The Cit 2 would still have residual thrust from it's two engines if not reverse thrust equip & a lot more inertia. Still I don't know the exact specs of the 'slowtation' but would be very surprised if it could stop in less than 700 mtrs where as the B200 can stop in around half that.
AFAIK they can - I know for a fact the old 2 I used to fly pulled up in a little over 400 metres ground roll once when an animal ran out in front of it during landing and the crew stomped on the brakes.
There's not a huge amount of residual thrust at idle, but you
do noticeit more when it's cold and the aeroplane is empty.
Given a choice between a Citation and a Kingair, no way I'd choose the prop beast.