I am considering trying out Jet Airways BRU-NYC route in april, and I have a few questions.

1. Which aircraft is the newest (and offers best seats in Y) 777 og 330?
2. Any idea on which load is lowest - the flight to JFK or EWR - I wouldn't mind a quiet flight.
3. Can Flying blue miles be used to upgrade flights?

Thanks for any other advice for a passenger in Y.