The Vigor167 replaces the Vigor165, the Vigor166 remains available as a G.Fast modem. This has to do with the fact that there is no chipset that supports ADSL and G.Fast at the same time, as both have a similar frequency spectrum and interference could occur. Thus there is the Vigor167 for ADSL / VDSL / supervectoring connections, the Vigor166 serves G.Fast connections with 106Mhz and 212MHz In the Network Connections control panel window, there should be a Local Area Connection adapter, which will usually be the network adapter on the computer:

The Vigor167 is characterized by its diverse compatibility with most DSL variants and profiles. It supports everything from DSL Light to the most common VDSL and ADSL variants, such as Profile 17a, with and without vectoring, to Profile 35b supervectoring. Standard (plaintext) HTTP is disabled, and encrypted TLS/SSL is in use. Use a https prefix to access the router WUI using SSL/TLS. The configuration and commissioning is, as is already well known from the Vigor160 series, very simple and intuitive and does not present the user with any unnecessary challenges so that the modem can start operating in the shortest possible time. It has support for ADSL (not enabled in this current firmware), VDSL and G.Fast so i think can be considered a all in one replacement for those on VDSL but thinking of going G.Fast if they are not on the list for full fibre (yet). Seems to be a rev-up of existing Vigor 165 - with some indication that the Vigor 165 will be replaced in the lineup. The Vigor 166 remains as is - it has a different chipset, the chipset that supports G.FAST connections.Vigor167 product news 9-april-2021 In German, but (basic) translation below: https://www.draytek.de/aktuelle-news-lesen/items/vigor167-neu-annexa-telekom-testcenter-annexb-modem-supervectoring.html

DrayTek's Vigor 167 is an ideal modem to connect your DrayTek Vigor router, or any Router and Firewall, to a DSL line. The Vigor 167 is VDSL2 35b and ADSL2+ modem to Ethernet bridge, connecting VDSL or ADSL to your Ethernet-based Router or Firewall. It provides proven compatibility with UK VDSL2 and ADSL2+ networks. Extensively tested to meet your expectations, the Vigor 167 provides a reliable and secure DSL connection and is compatible with all current UK UDSL2/ADSL+ networks. The DrayTek Vigor 167 ADSL2+/VDSL2 Modem is VDSL2 35b and ADSL2+ modem to Ethernet bridge, connecting VDSL or ADSL to your Ethernet-based router or firewall. It provides proven compatibility with UK VDSL2 and ADSL2+ networks. The Vigor 167 is an ideal modem to connect your DrayTek Vigor router, or any router and firewall, to a DSL line. Key Features Overall, conformity has also been increased, with ITU-T G.992.1 ADSL G.dmt, G.992.3 ADSL2 G.dmt.bis, G.992.5 ADSL2 +, G.993.1 VDSL, G.993.2 VDSL2, G.993.5 vectoring, G.997.1 supported.if you open the web console (middle button on the top right next to the floppy disk symbol) and type vdsl status it will tell you the path mode and interleave.