4650G PRO = OEM and MPK, Multiplier locked, ECC support
4600G = Retail, Multiplier un-locked, No ECC support
https://www.amd.com/en/product/10201
https://www.amd.com/en/product/10246
The 5600g would be a better buy at this time - than the preceding processors.
Ryzen 5 Pro 4650g, ASRock B550 Phantom Gaming 4/ac, 16GB Crucial Ballistix 3600MHz, SAMSUNG 970 EVO NVMe 500GB, Super Flower Leadex III Gold 850W