Everything else held equal it will always take more energy to have multiple computers ready to verify transactions, as well as the computational overhead of determining on the fly which computer actually will verify which transaction, than to have one computer verifying transactions.

From your own link, PoS Ethereum is 1/30,000 the energy cost of PoW Ethereum. From this link (https://arxiv.org/pdf/2203.03717.pdf ), back in 2021 PoW Ethereum spent 125.36 kWh per transaction, while VISA spent 0.0015 kWh, an 83 thousand fold difference. Depending on how these numbers all shake out VISA is still superior to PoS Ethereum by about 2-3X per transaction.