Is anyone here carrying both cards? Is there a distinct advantage of having both cards? The ones I can think of are:

1) Using AMEX Travel to purchase C class tickets. Recently my friends are able to buy C class tickets through AMEX Travel that I can't find it cheaper anywhere else.
2) AMEX points have more flexibility than Bonvoy points.
3) I'm already Bonvoy lifetime Platinum, having Brilliant is just icing on the cake.

Just a few things I can think of. Therefore I'm wondering if any of you are already carrying both cards and what make you think having both cards are worth it instead of just one.

Thanks