This paragraph is on an articular of a newspaper:
Thai officials arrested the five-man crew on Friday after seizing the large cargo craft at Bangkok’s military airport, where the crew had landed to refuel. It was unclear why the crew would have chosen a close American ally for a refueling stop, rather than neighboring Myanmar, which has deep business and political ties to North Korea.
--taken from The New York Times
I dont know what is the difference between:
1.It was unclear why the crew would have chosen a close American ally for a refueling stop (would+have+pp)
2.It was unclear why the crew chose a close American ally for a refueling stop (the simple past)