You're welcome. Some assignments have this kind of a twist, unluckily it isn't described. Express Train, Eagle's Nest, Open Fire and Need Only One are the same from what I remember. Nothing beats Perfect Landing though - you need to get a 10 killstreak and land on Caspian or Firestorm tower in the same round... but wait, there's more. If you get a killstreak first you will have to land on top of the tower in the same life or killstreak will reset. If you land before you get a killstreak you can get the killstreak at any point of the round.
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for a proper answers that are not included in the BF4 own website
