DJI Lightbridge A2 or Wookong-M?

Hi, I'm planing to use Lightbridge for my video link, I know a2 would have additional channels than Wookong-M, but what about when I use lightbridge any benefit?

I may be wrong by my understanding is all the 2.4GHZ data will go thought light bridge? or I Will still be using A2 to send data to the Futaba transmitter?
 

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