Answer: how it’s going! You shouldn’t be completely honest if they ask you the same thing though. I think the best option is that due to them being able to express what they have been through with you and what you missed to catch up on
Explanation:
Rainsford does not hold human life on the same level as animal life. For Rainsford hunting is a sport or a means to gain food, not a mere even to simply kill for the love of killing.
Zaroff's ideas counter this in that Zaroff has progressed to the point where killing humans, the most intelligent beings, has become a sport to him.
The bottom line is that the two men have different world views which influence their actions.