Af-packet vs nfqueue in IPS mode

Hello,
I am currently thinking of deploying Suricata as an IPS solution that acts as a gateway between my network and the internet. I found the 2 modes af-packet and nfqueue, but I can’t understand well the big difference between them and which is better for this scenario.

Essentially with af-packet you have a bridge, with nfqueue you have a router.

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