Here in NRW, Vodafone (=UnityMedia, in BW = KabelBW) only installs fiber optic cables. How it is in BW? No idea ... With Vodafone, you get a little metal plate on the wall with the HÜP, from which the internal house wiring runs via at least 2-fold shielded coax (formerly often "thick" RG11) to the router. So often directly next door with a 1m cable. Then it continues as usual via LAN cable. Even the internal Telekom wiring is not really better, you only save that little piece of coax. Here too, you have to do the rest yourself (or have it done) ;-).
If you need IPV4 / Dualstack, go to Telekom, as it is included in the affordable private customer tariff; with UM / VF you have to book a business tariff for that. Otherwise, there is only DSLite / IPV6. Currently, UM offers a bit more in upload (with 500 down -> 50 up). Telekom mW only offers 40 even at 250MBit/s down.