According to reports, the GeForce RTX 2060 12 GB will offer more than double the VRAM of the RTX 2060. Instead, the 12 GB card will match the RTX 2060 SUPER in many areas, including CUDA cores.
https://www.notebookcheck.net/NVIDIA-GeForce-RTX-2060-12-GB-to-be-more-than-an-RTX-2060-with-double-the-VRAM.581855.0.html