The GeForce RTX 3050 and GeForce RTX 3060 will be based on different GPUs, according to updated PCI IDs. Apparently, the RTX 3050 could be the only card to utilise the GA107 GPU, while NVIDIA will use its GA106 GPU for the GeForce RTX 3060.
https://www.notebookcheck.net/PCI-IDs-shed-light-on-the-NVIDIA-GeForce-RTX-3050-and-GeForce-RTX-3060-desktop-graphics-cards.508883.0.html