Is there any benefit / advantage to buying a feast for crows expansion and playing with mother of dragons expansion?

I have the dance with dragons expansion and intend to use that but I'm not sure if I need Feast for crows for updated Arryn cards or anything like that?

Thanks,

I believe you could use the arryn cards from AFFC for one of the card setups but otherwise there is no specific advantage in regard to mother of dragons.

That being said, feast for crows is a great version for 4 player and is good when you want a faster game. Having mother of dragons already is nice in that you can use the arryn pieces and orders when playing AFFC.