ASUS RT-AC88U Firewall????

I have asked this on another forum with no success. I've searched for answers without success either, so forgive me if this has been answered before.

I am thinking of purchasing this router so I did a comparison on the ASUS website with the RT-AC88U and my RT-AC68U.

I noticed

RT-AC68U
Firewall：SPI intrusion detection,DoS protection
Access control：Parental control, Network service filter, URL filter, Port filter

RT-AC88U
Access control：Parental...

ASUS RT-AC88U Firewall????