I have one of each. Trevor will stay in the room when company comes and, if he feels so inclined, will welcome them with a rub up against their legs (not a good thing when they are wearing dark clothes ).

Andy, on the other hand, is like a streak of white lightning when someone comes to visit. He is through the cat flap to the basement in an instant and doesn't reappear until they leave. If he happens to recognize the voices of the 'intruders' he will come back up sooner though.