As far as I know, the SM-G781V (which is the Verizon skew of the S20 FE) has some hardware differences that may prevent this swap from working properly. The Verizon S20 FE has some Ultrawide band hardware for their network, and this may cause issues when swapping motherboards, as the Verizon model is a different phone. I would just stick to the motherboard that matches the original to be safe. It definitely is better than "saving money" when you are taking a big risk buying a board you probably can't return.