@aj6828 I actually tested a Spark Smart Modem during the beta and it worked fine. This was however running Spark firmware but there is no real difference between Spark / Skinny firmware apart from branding and the lack of a default PPPoE VLAN tag on the Skinny variant.
Really, the Smart Modem's will work out of the box on Quic with no configuration required as they're configured with PPPoE. They can also fully offload PPPoE achieving Gigabit speeds plus did you know the Smart Modem 3 actually has 2.5Gbit Ethernet on the WAN port? Otherwise there really isn't too much point to configure these with IPoE and I would actually recommend you use PPPoE on these routers and other ISP provided consumer grade routers instead.