That's not a modem, it's a gateway.
I would image the biggest advantage of the 10 Gb LAN port, is to connect it to a switch or a real router that has 10 Gb Ethernet ports so you're LAN is 10 Gb. Typically with these devices you can't put them into bridge or IP pass through mode, not sure if the same holds true for the CGW450 or not. If so, using a real router would be a result in being double NAT'd while already being behind CG NAT. Not good. Everything I see has the CGW450 as being sub 6 only, so no mmWave support. Without mmWave you'll never get anywhere close to 10 Gb over cellular
