As part of an award trip in a couple months, I'm flying NRT-PVG. CA (Air China) recently changed equip on the route to the A343 which is 3 cabin. I'm scheduled on NH (ANA) in regional C on the 763. Should I change to F on the CA 343? I'm a little leery because I've read stories of CA giving trouble to UA award ticket holders saying their reservations don't exist. What's the consensus?