You can expect it on December 2nd. The MSRP is reportedly $399 but whether the card will be available in sufficient volume is questionable. NVIDIA indicated last week that supply of its RTX 30 series won't get a lot better until next year.
The RTX 3060 Ti Founders Edition features an identical cooler design to the RTX 3070 Founders. There is, however, a small difference in the color, as the 3060 Ti is a bit more silver. The card features the same single 12-pin power cable located in the most inconvenient place possible (in the center). Do note, that the 3060 Ti Founders Edition comes with the adapter.